Finding the Fourth Proportional to 79,920.32, 110,242.56 and 51,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,920.32 : 110,242.56 = 51,642.72 : x
2. Step 2: Convert to fraction form
   79,920.32/110,242.56 = 51,642.72/x
3. Step 3: Cross multiply
   79,920.32x = 110,242.56 × 51,642.72
4. Step 4: Simplify right side
   79,920.32x = 5,693,225,658.16
5. Step 5: Solve for x
   x = 5,693,225,658.16/79,920.32
6. Step 6: Final answer
   x = 71,236.27