Finding the Fourth Proportional to 52,629.72, 72,629.28 and 28,756.80

Step by Step Solution

1. Step 1: Write the proportion equation
   52,629.72 : 72,629.28 = 28,756.80 : x
2. Step 2: Convert to fraction form
   52,629.72/72,629.28 = 28,756.80/x
3. Step 3: Cross multiply
   52,629.72x = 72,629.28 × 28,756.80
4. Step 4: Simplify right side
   52,629.72x = 2,088,585,679.10
5. Step 5: Solve for x
   x = 2,088,585,679.10/52,629.72
6. Step 6: Final answer
   x = 39,684.53