Finding the Fourth Proportional to 99,684.61, 137,564.35 and 54,362.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,684.61 : 137,564.35 = 54,362.47 : x
2. Step 2: Convert to fraction form
   99,684.61/137,564.35 = 54,362.47/x
3. Step 3: Cross multiply
   99,684.61x = 137,564.35 × 54,362.47
4. Step 4: Simplify right side
   99,684.61x = 7,478,337,849.94
5. Step 5: Solve for x
   x = 7,478,337,849.94/99,684.61
6. Step 6: Final answer
   x = 75,019.98