Finding the Fourth Proportional to 12,645.32, 17,442.42 and 7,677.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645.32 : 17,442.42 = 7,677.32 : x
2. Step 2: Convert to fraction form
   12,645.32/17,442.42 = 7,677.32/x
3. Step 3: Cross multiply
   12,645.32x = 17,442.42 × 7,677.32
4. Step 4: Simplify right side
   12,645.32x = 133,911,039.91
5. Step 5: Solve for x
   x = 133,911,039.91/12,645.32
6. Step 6: Final answer
   x = 10,589.77