Finding the Fourth Proportional to 72,877.32, 100,449.72 and 57,743.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,877.32 : 100,449.72 = 57,743.28 : x
2. Step 2: Convert to fraction form
   72,877.32/100,449.72 = 57,743.28/x
3. Step 3: Cross multiply
   72,877.32x = 100,449.72 × 57,743.28
4. Step 4: Simplify right side
   72,877.32x = 5,800,296,307.88
5. Step 5: Solve for x
   x = 5,800,296,307.88/72,877.32
6. Step 6: Final answer
   x = 79,589.87