Finding the Fourth Proportional to 12,407.72, 17,124.21 and 7,692.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.72 : 17,124.21 = 7,692.71 : x
2. Step 2: Convert to fraction form
   12,407.72/17,124.21 = 7,692.71/x
3. Step 3: Cross multiply
   12,407.72x = 17,124.21 × 7,692.71
4. Step 4: Simplify right side
   12,407.72x = 131,731,495.89
5. Step 5: Solve for x
   x = 131,731,495.89/12,407.72
6. Step 6: Final answer
   x = 10,616.90