Finding the Fourth Proportional to 79,028.55, 109,061.55 and 47,215.80

Step by Step Solution

1. Step 1: Write the proportion equation
   79,028.55 : 109,061.55 = 47,215.80 : x
2. Step 2: Convert to fraction form
   79,028.55/109,061.55 = 47,215.80/x
3. Step 3: Cross multiply
   79,028.55x = 109,061.55 × 47,215.80
4. Step 4: Simplify right side
   79,028.55x = 5,149,428,332.49
5. Step 5: Solve for x
   x = 5,149,428,332.49/79,028.55
6. Step 6: Final answer
   x = 65,159.09