Finding the Fourth Proportional to 79,311.76, 109,469.32 and 53,860.55

Step by Step Solution

1. Step 1: Write the proportion equation
   79,311.76 : 109,469.32 = 53,860.55 : x
2. Step 2: Convert to fraction form
   79,311.76/109,469.32 = 53,860.55/x
3. Step 3: Cross multiply
   79,311.76x = 109,469.32 × 53,860.55
4. Step 4: Simplify right side
   79,311.76x = 5,896,077,101.33
5. Step 5: Solve for x
   x = 5,896,077,101.33/79,311.76
6. Step 6: Final answer
   x = 74,340.52