Finding the Third Proportional to 39,278.67 and 85,387.92

Step by Step Solution

1. Step 1: Write the proportion equation
   39,278.67 : 85,387.92 = 85,387.92 : x
2. Step 2: Convert to fraction form
   39,278.67/85,387.92 = 85,387.92/x
3. Step 3: Cross multiply
   39,278.67x = 85,387.92 × 85,387.92
4. Step 4: Simplify right side
   39,278.67x = 7,291,097,202.13
5. Step 5: Solve for x
   x = 7,291,097,202.13/39,278.67
6. Step 6: Final answer
   x = 185,624.84