Finding the Fourth Proportional to 2,085,878,863.89, 3,128,819,417.34 and 775,610,663.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085,878,863.89 : 3,128,819,417.34 = 775,610,663.19 : x
2. Step 2: Convert to fraction form
   2,085,878,863.89/3,128,819,417.34 = 775,610,663.19/x
3. Step 3: Cross multiply
   2,085,878,863.89x = 3,128,819,417.34 × 775,610,663.19
4. Step 4: Simplify right side
   2,085,878,863.89x = 2,426,745,703,284,827,136
5. Step 5: Solve for x
   x = 2,426,745,703,284,827,136/2,085,878,863.89
6. Step 6: Final answer
   x = 1,163,416,411.80