Finding the Fourth Proportional to 14,426.60, 19,909.06 and 8,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   14,426.60 : 19,909.06 = 8,139.38 : x
2. Step 2: Convert to fraction form
   14,426.60/19,909.06 = 8,139.38/x
3. Step 3: Cross multiply
   14,426.60x = 19,909.06 × 8,139.38
4. Step 4: Simplify right side
   14,426.60x = 162,047,284.89
5. Step 5: Solve for x
   x = 162,047,284.89/14,426.60
6. Step 6: Final answer
   x = 11,232.54