Finding the Fourth Proportional to 51,402.90, 70,932.72 and 28,743.76

Step by Step Solution

1. Step 1: Write the proportion equation
   51,402.90 : 70,932.72 = 28,743.76 : x
2. Step 2: Convert to fraction form
   51,402.90/70,932.72 = 28,743.76/x
3. Step 3: Cross multiply
   51,402.90x = 70,932.72 × 28,743.76
4. Step 4: Simplify right side
   51,402.90x = 2,038,873,079.83
5. Step 5: Solve for x
   x = 2,038,873,079.83/51,402.90
6. Step 6: Final answer
   x = 39,664.55