Finding the Fourth Proportional to 131,016.56, 180,810.24 and 74,439.68

Step by Step Solution

1. Step 1: Write the proportion equation
   131,016.56 : 180,810.24 = 74,439.68 : x
2. Step 2: Convert to fraction form
   131,016.56/180,810.24 = 74,439.68/x
3. Step 3: Cross multiply
   131,016.56x = 180,810.24 × 74,439.68
4. Step 4: Simplify right side
   131,016.56x = 13,459,456,406.32
5. Step 5: Solve for x
   x = 13,459,456,406.32/131,016.56
6. Step 6: Final answer
   x = 102,730.96