Finding the Fourth Proportional to 99,984.08, 137,978.02 and 54,662.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,984.08 : 137,978.02 = 54,662.05 : x
2. Step 2: Convert to fraction form
   99,984.08/137,978.02 = 54,662.05/x
3. Step 3: Cross multiply
   99,984.08x = 137,978.02 × 54,662.05
4. Step 4: Simplify right side
   99,984.08x = 7,542,161,833.96
5. Step 5: Solve for x
   x = 7,542,161,833.96/99,984.08
6. Step 6: Final answer
   x = 75,433.63