Finding the Fourth Proportional to 79,290.28, 109,420.52 and 42,992.92

Step by Step Solution

1. Step 1: Write the proportion equation
   79,290.28 : 109,420.52 = 42,992.92 : x
2. Step 2: Convert to fraction form
   79,290.28/109,420.52 = 42,992.92/x
3. Step 3: Cross multiply
   79,290.28x = 109,420.52 × 42,992.92
4. Step 4: Simplify right side
   79,290.28x = 4,704,307,584.53
5. Step 5: Solve for x
   x = 4,704,307,584.53/79,290.28
6. Step 6: Final answer
   x = 59,330.20