Finding the Fourth Proportional to 131,856.23, 181,961.16 and 71,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,856.23 : 181,961.16 = 71,426.72 : x
2. Step 2: Convert to fraction form
   131,856.23/181,961.16 = 71,426.72/x
3. Step 3: Cross multiply
   131,856.23x = 181,961.16 × 71,426.72
4. Step 4: Simplify right side
   131,856.23x = 12,996,888,826.20
5. Step 5: Solve for x
   x = 12,996,888,826.20/131,856.23
6. Step 6: Final answer
   x = 98,568.64