Finding the Fourth Proportional to 99,622.50, 137,478.16 and 54,300.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,622.50 : 137,478.16 = 54,300.48 : x
2. Step 2: Convert to fraction form
   99,622.50/137,478.16 = 54,300.48/x
3. Step 3: Cross multiply
   99,622.50x = 137,478.16 × 54,300.48
4. Step 4: Simplify right side
   99,622.50x = 7,465,130,077.52
5. Step 5: Solve for x
   x = 7,465,130,077.52/99,622.50
6. Step 6: Final answer
   x = 74,934.18