Finding the Fourth Proportional to 12,406.79, 17,124.05 and 7,630.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.79 : 17,124.05 = 7,630.77 : x
2. Step 2: Convert to fraction form
   12,406.79/17,124.05 = 7,630.77/x
3. Step 3: Cross multiply
   12,406.79x = 17,124.05 × 7,630.77
4. Step 4: Simplify right side
   12,406.79x = 130,669,648.86
5. Step 5: Solve for x
   x = 130,669,648.86/12,406.79
6. Step 6: Final answer
   x = 10,532.11