Finding the Third Proportional to 6,439.50 and 9,385.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,439.50 : 9,385.88 = 9,385.88 : x
2. Step 2: Convert to fraction form
   6,439.50/9,385.88 = 9,385.88/x
3. Step 3: Cross multiply
   6,439.50x = 9,385.88 × 9,385.88
4. Step 4: Simplify right side
   6,439.50x = 88,094,649.52
5. Step 5: Solve for x
   x = 88,094,649.52/6,439.50
6. Step 6: Final answer
   x = 13,680.36