Finding the Fourth Proportional to 866,902.98, 1,300,616.28 and 259,711.05

Step by Step Solution

1. Step 1: Write the proportion equation
   866,902.98 : 1,300,616.28 = 259,711.05 : x
2. Step 2: Convert to fraction form
   866,902.98/1,300,616.28 = 259,711.05/x
3. Step 3: Cross multiply
   866,902.98x = 1,300,616.28 × 259,711.05
4. Step 4: Simplify right side
   866,902.98x = 337,784,419,725.89
5. Step 5: Solve for x
   x = 337,784,419,725.89/866,902.98
6. Step 6: Final answer
   x = 389,645.01