Finding the Fourth Proportional to 11,643.13, 16,064.89 and 9,762.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,643.13 : 16,064.89 = 9,762.31 : x
2. Step 2: Convert to fraction form
   11,643.13/16,064.89 = 9,762.31/x
3. Step 3: Cross multiply
   11,643.13x = 16,064.89 × 9,762.31
4. Step 4: Simplify right side
   11,643.13x = 156,830,436.30
5. Step 5: Solve for x
   x = 156,830,436.30/11,643.13
6. Step 6: Final answer
   x = 13,469.78