Finding the Fourth Proportional to 14,267.34, 19,687.86 and 7,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,267.34 : 19,687.86 = 7,978.50 : x
2. Step 2: Convert to fraction form
   14,267.34/19,687.86 = 7,978.50/x
3. Step 3: Cross multiply
   14,267.34x = 19,687.86 × 7,978.50
4. Step 4: Simplify right side
   14,267.34x = 157,079,591.01
5. Step 5: Solve for x
   x = 157,079,591.01/14,267.34
6. Step 6: Final answer
   x = 11,009.73