Finding the Fourth Proportional to 12,763.47, 17,612.28 and 7,457.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,763.47 : 17,612.28 = 7,457.61 : x
2. Step 2: Convert to fraction form
   12,763.47/17,612.28 = 7,457.61/x
3. Step 3: Cross multiply
   12,763.47x = 17,612.28 × 7,457.61
4. Step 4: Simplify right side
   12,763.47x = 131,345,515.45
5. Step 5: Solve for x
   x = 131,345,515.45/12,763.47
6. Step 6: Final answer
   x = 10,290.74