Finding the Third Proportional to 39,748.50 and 55,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,748.50 : 55,711.50 = 55,711.50 : x
2. Step 2: Convert to fraction form
   39,748.50/55,711.50 = 55,711.50/x
3. Step 3: Cross multiply
   39,748.50x = 55,711.50 × 55,711.50
4. Step 4: Simplify right side
   39,748.50x = 3,103,771,232.25
5. Step 5: Solve for x
   x = 3,103,771,232.25/39,748.50
6. Step 6: Final answer
   x = 78,085.24