Finding the Fourth Proportional to 99,623.50, 137,479.54 and 54,301.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,623.50 : 137,479.54 = 54,301.48 : x
2. Step 2: Convert to fraction form
   99,623.50/137,479.54 = 54,301.48/x
3. Step 3: Cross multiply
   99,623.50x = 137,479.54 × 54,301.48
4. Step 4: Simplify right side
   99,623.50x = 7,465,342,491.72
5. Step 5: Solve for x
   x = 7,465,342,491.72/99,623.50
6. Step 6: Final answer
   x = 74,935.56