Finding the Fourth Proportional to 10,714.78, 16,059.84 and 7,200.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,714.78 : 16,059.84 = 7,200.55 : x
2. Step 2: Convert to fraction form
   10,714.78/16,059.84 = 7,200.55/x
3. Step 3: Cross multiply
   10,714.78x = 16,059.84 × 7,200.55
4. Step 4: Simplify right side
   10,714.78x = 115,639,680.91
5. Step 5: Solve for x
   x = 115,639,680.91/10,714.78
6. Step 6: Final answer
   x = 10,792.54