Finding the Fourth Proportional to 99,016.43, 147,800.19 and 85,066.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,016.43 : 147,800.19 = 85,066.10 : x
2. Step 2: Convert to fraction form
   99,016.43/147,800.19 = 85,066.10/x
3. Step 3: Cross multiply
   99,016.43x = 147,800.19 × 85,066.10
4. Step 4: Simplify right side
   99,016.43x = 12,572,785,876.81
5. Step 5: Solve for x
   x = 12,572,785,876.81/99,016.43
6. Step 6: Final answer
   x = 126,976.77