Finding the Fourth Proportional to 11,009.12, 15,188.61 and 7,234.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,009.12 : 15,188.61 = 7,234.31 : x
2. Step 2: Convert to fraction form
   11,009.12/15,188.61 = 7,234.31/x
3. Step 3: Cross multiply
   11,009.12x = 15,188.61 × 7,234.31
4. Step 4: Simplify right side
   11,009.12x = 109,879,178.31
5. Step 5: Solve for x
   x = 109,879,178.31/11,009.12
6. Step 6: Final answer
   x = 9,980.75