Finding the Fourth Proportional to 14,123.62, 21,188.16 and 7,105.17

Step by Step Solution

1. Step 1: Write the proportion equation
   14,123.62 : 21,188.16 = 7,105.17 : x
2. Step 2: Convert to fraction form
   14,123.62/21,188.16 = 7,105.17/x
3. Step 3: Cross multiply
   14,123.62x = 21,188.16 × 7,105.17
4. Step 4: Simplify right side
   14,123.62x = 150,545,478.79
5. Step 5: Solve for x
   x = 150,545,478.79/14,123.62
6. Step 6: Final answer
   x = 10,659.13