Finding the Fourth Proportional to 123,105.42, 169,898.53 and 72,160.95

Step by Step Solution

1. Step 1: Write the proportion equation
   123,105.42 : 169,898.53 = 72,160.95 : x
2. Step 2: Convert to fraction form
   123,105.42/169,898.53 = 72,160.95/x
3. Step 3: Cross multiply
   123,105.42x = 169,898.53 × 72,160.95
4. Step 4: Simplify right side
   123,105.42x = 12,260,038,478.91
5. Step 5: Solve for x
   x = 12,260,038,478.91/123,105.42
6. Step 6: Final answer
   x = 99,589.76