Finding the Fourth Proportional to 99,681.24, 137,560.01 and 54,359.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,681.24 : 137,560.01 = 54,359.31 : x
2. Step 2: Convert to fraction form
   99,681.24/137,560.01 = 54,359.31/x
3. Step 3: Cross multiply
   99,681.24x = 137,560.01 × 54,359.31
4. Step 4: Simplify right side
   99,681.24x = 7,477,666,955.40
5. Step 5: Solve for x
   x = 7,477,666,955.40/99,681.24
6. Step 6: Final answer
   x = 75,015.79