Finding the Fourth Proportional to 99,719.27, 137,613.23 and 54,397.95

Step by Step Solution

1. Step 1: Write the proportion equation
   99,719.27 : 137,613.23 = 54,397.95 : x
2. Step 2: Convert to fraction form
   99,719.27/137,613.23 = 54,397.95/x
3. Step 3: Cross multiply
   99,719.27x = 137,613.23 × 54,397.95
4. Step 4: Simplify right side
   99,719.27x = 7,485,877,332.89
5. Step 5: Solve for x
   x = 7,485,877,332.89/99,719.27
6. Step 6: Final answer
   x = 75,069.52