Finding the Fourth Proportional to 395,061.30, 592,847.10 and 217,695.60

Step by Step Solution

1. Step 1: Write the proportion equation
   395,061.30 : 592,847.10 = 217,695.60 : x
2. Step 2: Convert to fraction form
   395,061.30/592,847.10 = 217,695.60/x
3. Step 3: Cross multiply
   395,061.30x = 592,847.10 × 217,695.60
4. Step 4: Simplify right side
   395,061.30x = 129,060,205,142.76
5. Step 5: Solve for x
   x = 129,060,205,142.76/395,061.30
6. Step 6: Final answer
   x = 326,684.00