Finding the Third Proportional to 39,378.50 and 84,978.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,378.50 : 84,978.75 = 84,978.75 : x
2. Step 2: Convert to fraction form
   39,378.50/84,978.75 = 84,978.75/x
3. Step 3: Cross multiply
   39,378.50x = 84,978.75 × 84,978.75
4. Step 4: Simplify right side
   39,378.50x = 7,221,387,951.56
5. Step 5: Solve for x
   x = 7,221,387,951.56/39,378.50
6. Step 6: Final answer
   x = 183,384.03