Finding the Fourth Proportional to 52,401.80, 72,312.55 and 28,528.00

Step by Step Solution

1. Step 1: Write the proportion equation
   52,401.80 : 72,312.55 = 28,528.00 : x
2. Step 2: Convert to fraction form
   52,401.80/72,312.55 = 28,528.00/x
3. Step 3: Cross multiply
   52,401.80x = 72,312.55 × 28,528.00
4. Step 4: Simplify right side
   52,401.80x = 2,062,932,174.30
5. Step 5: Solve for x
   x = 2,062,932,174.30/52,401.80
6. Step 6: Final answer
   x = 39,367.58