Finding the Fourth Proportional to 79,543.91, 109,668.72 and 65,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,543.91 : 109,668.72 = 65,150.72 : x
2. Step 2: Convert to fraction form
   79,543.91/109,668.72 = 65,150.72/x
3. Step 3: Cross multiply
   79,543.91x = 109,668.72 × 65,150.72
4. Step 4: Simplify right side
   79,543.91x = 7,144,995,521.13
5. Step 5: Solve for x
   x = 7,144,995,521.13/79,543.91
6. Step 6: Final answer
   x = 89,824.55