Finding the Fourth Proportional to 72,160.47, 108,200.21 and 49,697.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,160.47 : 108,200.21 = 49,697.55 : x
2. Step 2: Convert to fraction form
   72,160.47/108,200.21 = 49,697.55/x
3. Step 3: Cross multiply
   72,160.47x = 108,200.21 × 49,697.55
4. Step 4: Simplify right side
   72,160.47x = 5,377,285,098.00
5. Step 5: Solve for x
   x = 5,377,285,098.00/72,160.47
6. Step 6: Final answer
   x = 74,518.43