Finding the Fourth Proportional to 636,196.32, 877,957.15 and 345,807.70

Step by Step Solution

1. Step 1: Write the proportion equation
   636,196.32 : 877,957.15 = 345,807.70 : x
2. Step 2: Convert to fraction form
   636,196.32/877,957.15 = 345,807.70/x
3. Step 3: Cross multiply
   636,196.32x = 877,957.15 × 345,807.70
4. Step 4: Simplify right side
   636,196.32x = 303,604,343,901.89
5. Step 5: Solve for x
   x = 303,604,343,901.89/636,196.32
6. Step 6: Final answer
   x = 477,218.02