Finding the Fourth Proportional to 109,316.88, 150,899.61 and 85,451.24

Step by Step Solution

1. Step 1: Write the proportion equation
   109,316.88 : 150,899.61 = 85,451.24 : x
2. Step 2: Convert to fraction form
   109,316.88/150,899.61 = 85,451.24/x
3. Step 3: Cross multiply
   109,316.88x = 150,899.61 × 85,451.24
4. Step 4: Simplify right side
   109,316.88x = 12,894,558,035.52
5. Step 5: Solve for x
   x = 12,894,558,035.52/109,316.88
6. Step 6: Final answer
   x = 117,955.78