Finding the Fourth Proportional to 14,443.20, 19,931.04 and 8,156.88

Step by Step Solution

1. Step 1: Write the proportion equation
   14,443.20 : 19,931.04 = 8,156.88 : x
2. Step 2: Convert to fraction form
   14,443.20/19,931.04 = 8,156.88/x
3. Step 3: Cross multiply
   14,443.20x = 19,931.04 × 8,156.88
4. Step 4: Simplify right side
   14,443.20x = 162,575,101.56
5. Step 5: Solve for x
   x = 162,575,101.56/14,443.20
6. Step 6: Final answer
   x = 11,256.17