Finding the Fourth Proportional to 12,900.87, 17,802.59 and 7,234.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.87 : 17,802.59 = 7,234.92 : x
2. Step 2: Convert to fraction form
   12,900.87/17,802.59 = 7,234.92/x
3. Step 3: Cross multiply
   12,900.87x = 17,802.59 × 7,234.92
4. Step 4: Simplify right side
   12,900.87x = 128,800,278.27
5. Step 5: Solve for x
   x = 128,800,278.27/12,900.87
6. Step 6: Final answer
   x = 9,983.84