Finding the Fourth Proportional to 51,002.88, 70,387.20 and 28,648.32

Step by Step Solution

1. Step 1: Write the proportion equation
   51,002.88 : 70,387.20 = 28,648.32 : x
2. Step 2: Convert to fraction form
   51,002.88/70,387.20 = 28,648.32/x
3. Step 3: Cross multiply
   51,002.88x = 70,387.20 × 28,648.32
4. Step 4: Simplify right side
   51,002.88x = 2,016,475,029.50
5. Step 5: Solve for x
   x = 2,016,475,029.50/51,002.88
6. Step 6: Final answer
   x = 39,536.49