Finding the Fourth Proportional to 52,563.30, 72,534.69 and 28,689.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,563.30 : 72,534.69 = 28,689.78 : x
2. Step 2: Convert to fraction form
   52,563.30/72,534.69 = 28,689.78/x
3. Step 3: Cross multiply
   52,563.30x = 72,534.69 × 28,689.78
4. Step 4: Simplify right side
   52,563.30x = 2,081,004,298.47
5. Step 5: Solve for x
   x = 2,081,004,298.47/52,563.30
6. Step 6: Final answer
   x = 39,590.44