Finding the Fourth Proportional to 12,444.61, 17,172.31 and 7,663.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,444.61 : 17,172.31 = 7,663.79 : x
2. Step 2: Convert to fraction form
   12,444.61/17,172.31 = 7,663.79/x
3. Step 3: Cross multiply
   12,444.61x = 17,172.31 × 7,663.79
4. Step 4: Simplify right side
   12,444.61x = 131,604,891.79
5. Step 5: Solve for x
   x = 131,604,891.79/12,444.61
6. Step 6: Final answer
   x = 10,575.25