Finding the Fourth Proportional to 2,561,128.30, 3,841,911.15 and 878,231.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561,128.30 : 3,841,911.15 = 878,231.80 : x
2. Step 2: Convert to fraction form
   2,561,128.30/3,841,911.15 = 878,231.80/x
3. Step 3: Cross multiply
   2,561,128.30x = 3,841,911.15 × 878,231.80
4. Step 4: Simplify right side
   2,561,128.30x = 3,374,088,544,704.57
5. Step 5: Solve for x
   x = 3,374,088,544,704.57/2,561,128.30
6. Step 6: Final answer
   x = 1,317,422.69