Finding the Fourth Proportional to 14,427.57, 19,910.34 and 8,139.93

Step by Step Solution

1. Step 1: Write the proportion equation
   14,427.57 : 19,910.34 = 8,139.93 : x
2. Step 2: Convert to fraction form
   14,427.57/19,910.34 = 8,139.93/x
3. Step 3: Cross multiply
   14,427.57x = 19,910.34 × 8,139.93
4. Step 4: Simplify right side
   14,427.57x = 162,068,773.88
5. Step 5: Solve for x
   x = 162,068,773.88/14,427.57
6. Step 6: Final answer
   x = 11,233.27