Finding the Fourth Proportional to 109,701.20, 151,350.72 and 71,443.28

Step by Step Solution

1. Step 1: Write the proportion equation
   109,701.20 : 151,350.72 = 71,443.28 : x
2. Step 2: Convert to fraction form
   109,701.20/151,350.72 = 71,443.28/x
3. Step 3: Cross multiply
   109,701.20x = 151,350.72 × 71,443.28
4. Step 4: Simplify right side
   109,701.20x = 10,812,991,867.16
5. Step 5: Solve for x
   x = 10,812,991,867.16/109,701.20
6. Step 6: Final answer
   x = 98,567.67