Finding the Fourth Proportional to 16,086.52, 22,213.74 and 10,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,086.52 : 22,213.74 = 10,128.16 : x
2. Step 2: Convert to fraction form
   16,086.52/22,213.74 = 10,128.16/x
3. Step 3: Cross multiply
   16,086.52x = 22,213.74 × 10,128.16
4. Step 4: Simplify right side
   16,086.52x = 224,984,312.92
5. Step 5: Solve for x
   x = 224,984,312.92/16,086.52
6. Step 6: Final answer
   x = 13,985.89