Finding the Fourth Proportional to 647,856.78, 971,807.94 and 174,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   647,856.78 : 971,807.94 = 174,553.50 : x
2. Step 2: Convert to fraction form
   647,856.78/971,807.94 = 174,553.50/x
3. Step 3: Cross multiply
   647,856.78x = 971,807.94 × 174,553.50
4. Step 4: Simplify right side
   647,856.78x = 169,632,477,254.79
5. Step 5: Solve for x
   x = 169,632,477,254.79/647,856.78
6. Step 6: Final answer
   x = 261,836.38