Finding the Fourth Proportional to 116,912.56, 161,301.27 and 71,543.20

Step by Step Solution

1. Step 1: Write the proportion equation
   116,912.56 : 161,301.27 = 71,543.20 : x
2. Step 2: Convert to fraction form
   116,912.56/161,301.27 = 71,543.20/x
3. Step 3: Cross multiply
   116,912.56x = 161,301.27 × 71,543.20
4. Step 4: Simplify right side
   116,912.56x = 11,540,009,019.86
5. Step 5: Solve for x
   x = 11,540,009,019.86/116,912.56
6. Step 6: Final answer
   x = 98,706.32