Finding the Fourth Proportional to 9,887.16, 13,631.88 and 7,756.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,887.16 : 13,631.88 = 7,756.08 : x
2. Step 2: Convert to fraction form
   9,887.16/13,631.88 = 7,756.08/x
3. Step 3: Cross multiply
   9,887.16x = 13,631.88 × 7,756.08
4. Step 4: Simplify right side
   9,887.16x = 105,729,951.83
5. Step 5: Solve for x
   x = 105,729,951.83/9,887.16
6. Step 6: Final answer
   x = 10,693.66