Finding the Fourth Proportional to 111,086.76, 153,140.25 and 79,200.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,086.76 : 153,140.25 = 79,200.30 : x
2. Step 2: Convert to fraction form
   111,086.76/153,140.25 = 79,200.30/x
3. Step 3: Cross multiply
   111,086.76x = 153,140.25 × 79,200.30
4. Step 4: Simplify right side
   111,086.76x = 12,128,753,742.08
5. Step 5: Solve for x
   x = 12,128,753,742.08/111,086.76
6. Step 6: Final answer
   x = 109,182.71