Finding the Fourth Proportional to 15,401.58, 21,244.59 and 9,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,401.58 : 21,244.59 = 9,109.50 : x
2. Step 2: Convert to fraction form
   15,401.58/21,244.59 = 9,109.50/x
3. Step 3: Cross multiply
   15,401.58x = 21,244.59 × 9,109.50
4. Step 4: Simplify right side
   15,401.58x = 193,527,592.61
5. Step 5: Solve for x
   x = 193,527,592.61/15,401.58
6. Step 6: Final answer
   x = 12,565.44