Finding the Fourth Proportional to 9,913.00, 14,865.15 and 7,128.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.00 : 14,865.15 = 7,128.04 : x
2. Step 2: Convert to fraction form
   9,913.00/14,865.15 = 7,128.04/x
3. Step 3: Cross multiply
   9,913.00x = 14,865.15 × 7,128.04
4. Step 4: Simplify right side
   9,913.00x = 105,959,377.55
5. Step 5: Solve for x
   x = 105,959,377.55/9,913.00
6. Step 6: Final answer
   x = 10,688.93