Finding the Fourth Proportional to 15,409.31, 23,109.32 and 8,009.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,409.31 : 23,109.32 = 8,009.72 : x
2. Step 2: Convert to fraction form
   15,409.31/23,109.32 = 8,009.72/x
3. Step 3: Cross multiply
   15,409.31x = 23,109.32 × 8,009.72
4. Step 4: Simplify right side
   15,409.31x = 185,099,142.54
5. Step 5: Solve for x
   x = 185,099,142.54/15,409.31
6. Step 6: Final answer
   x = 12,012.16