Finding the Fourth Proportional to 12,900.52, 17,802.72 and 7,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.52 : 17,802.72 = 7,311.52 : x
2. Step 2: Convert to fraction form
   12,900.52/17,802.72 = 7,311.52/x
3. Step 3: Cross multiply
   12,900.52x = 17,802.72 × 7,311.52
4. Step 4: Simplify right side
   12,900.52x = 130,164,943.33
5. Step 5: Solve for x
   x = 130,164,943.33/12,900.52
6. Step 6: Final answer
   x = 10,089.90