Finding the Fourth Proportional to 12,605.76, 17,411.76 and 10,622.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,605.76 : 17,411.76 = 10,622.88 : x
2. Step 2: Convert to fraction form
   12,605.76/17,411.76 = 10,622.88/x
3. Step 3: Cross multiply
   12,605.76x = 17,411.76 × 10,622.88
4. Step 4: Simplify right side
   12,605.76x = 184,963,037.07
5. Step 5: Solve for x
   x = 184,963,037.07/12,605.76
6. Step 6: Final answer
   x = 14,672.90