Finding the Fourth Proportional to 132,111.72, 198,199.98 and 61,909.20

Step by Step Solution

1. Step 1: Write the proportion equation
   132,111.72 : 198,199.98 = 61,909.20 : x
2. Step 2: Convert to fraction form
   132,111.72/198,199.98 = 61,909.20/x
3. Step 3: Cross multiply
   132,111.72x = 198,199.98 × 61,909.20
4. Step 4: Simplify right side
   132,111.72x = 12,270,402,201.82
5. Step 5: Solve for x
   x = 12,270,402,201.82/132,111.72
6. Step 6: Final answer
   x = 92,878.98