Finding the Fourth Proportional to 51,590.74, 71,200.91 and 28,931.91

Step by Step Solution

1. Step 1: Write the proportion equation
   51,590.74 : 71,200.91 = 28,931.91 : x
2. Step 2: Convert to fraction form
   51,590.74/71,200.91 = 28,931.91/x
3. Step 3: Cross multiply
   51,590.74x = 71,200.91 × 28,931.91
4. Step 4: Simplify right side
   51,590.74x = 2,059,978,320.04
5. Step 5: Solve for x
   x = 2,059,978,320.04/51,590.74
6. Step 6: Final answer
   x = 39,929.23