Finding the Fourth Proportional to 10,160.69, 15,221.31 and 7,487.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,160.69 : 15,221.31 = 7,487.42 : x
2. Step 2: Convert to fraction form
   10,160.69/15,221.31 = 7,487.42/x
3. Step 3: Cross multiply
   10,160.69x = 15,221.31 × 7,487.42
4. Step 4: Simplify right side
   10,160.69x = 113,968,360.25
5. Step 5: Solve for x
   x = 113,968,360.25/10,160.69
6. Step 6: Final answer
   x = 11,216.60