Finding the Fourth Proportional to 14,395.59, 19,870.88 and 8,429.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,395.59 : 19,870.88 = 8,429.18 : x
2. Step 2: Convert to fraction form
   14,395.59/19,870.88 = 8,429.18/x
3. Step 3: Cross multiply
   14,395.59x = 19,870.88 × 8,429.18
4. Step 4: Simplify right side
   14,395.59x = 167,495,082.78
5. Step 5: Solve for x
   x = 167,495,082.78/14,395.59
6. Step 6: Final answer
   x = 11,635.17