Finding the Fourth Proportional to 10,642.61, 14,662.32 and 8,403.66

Step by Step Solution

1. Step 1: Write the proportion equation
   10,642.61 : 14,662.32 = 8,403.66 : x
2. Step 2: Convert to fraction form
   10,642.61/14,662.32 = 8,403.66/x
3. Step 3: Cross multiply
   10,642.61x = 14,662.32 × 8,403.66
4. Step 4: Simplify right side
   10,642.61x = 123,217,152.09
5. Step 5: Solve for x
   x = 123,217,152.09/10,642.61
6. Step 6: Final answer
   x = 11,577.72