Finding the Fourth Proportional to 10,631.96, 14,656.72 and 7,040.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,631.96 : 14,656.72 = 7,040.90 : x
2. Step 2: Convert to fraction form
   10,631.96/14,656.72 = 7,040.90/x
3. Step 3: Cross multiply
   10,631.96x = 14,656.72 × 7,040.90
4. Step 4: Simplify right side
   10,631.96x = 103,196,499.85
5. Step 5: Solve for x
   x = 103,196,499.85/10,631.96
6. Step 6: Final answer
   x = 9,706.25