Finding the Fourth Proportional to 10,196.91, 15,318.77 and 7,242.65

Step by Step Solution

1. Step 1: Write the proportion equation
   10,196.91 : 15,318.77 = 7,242.65 : x
2. Step 2: Convert to fraction form
   10,196.91/15,318.77 = 7,242.65/x
3. Step 3: Cross multiply
   10,196.91x = 15,318.77 × 7,242.65
4. Step 4: Simplify right side
   10,196.91x = 110,948,376.73
5. Step 5: Solve for x
   x = 110,948,376.73/10,196.91
6. Step 6: Final answer
   x = 10,880.59