Finding the Fourth Proportional to 99,693.10, 137,622.55 and 61,459.48

Step by Step Solution

1. Step 1: Write the proportion equation
   99,693.10 : 137,622.55 = 61,459.48 : x
2. Step 2: Convert to fraction form
   99,693.10/137,622.55 = 61,459.48/x
3. Step 3: Cross multiply
   99,693.10x = 137,622.55 × 61,459.48
4. Step 4: Simplify right side
   99,693.10x = 8,458,210,359.27
5. Step 5: Solve for x
   x = 8,458,210,359.27/99,693.10
6. Step 6: Final answer
   x = 84,842.49