Finding the Fourth Proportional to 1,389,443.84, 1,917,792.96 and 786,181.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,443.84 : 1,917,792.96 = 786,181.76 : x
2. Step 2: Convert to fraction form
   1,389,443.84/1,917,792.96 = 786,181.76/x
3. Step 3: Cross multiply
   1,389,443.84x = 1,917,792.96 × 786,181.76
4. Step 4: Simplify right side
   1,389,443.84x = 1,507,733,844,608.41
5. Step 5: Solve for x
   x = 1,507,733,844,608.41/1,389,443.84
6. Step 6: Final answer
   x = 1,085,134.79