Finding the Fourth Proportional to 11,191.37, 15,442.35 and 7,217.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,191.37 : 15,442.35 = 7,217.86 : x
2. Step 2: Convert to fraction form
   11,191.37/15,442.35 = 7,217.86/x
3. Step 3: Cross multiply
   11,191.37x = 15,442.35 × 7,217.86
4. Step 4: Simplify right side
   11,191.37x = 111,460,683.65
5. Step 5: Solve for x
   x = 111,460,683.65/11,191.37
6. Step 6: Final answer
   x = 9,959.53