Finding the Third Proportional to 39,698.50 and 56,428.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,698.50 : 56,428.50 = 56,428.50 : x
2. Step 2: Convert to fraction form
   39,698.50/56,428.50 = 56,428.50/x
3. Step 3: Cross multiply
   39,698.50x = 56,428.50 × 56,428.50
4. Step 4: Simplify right side
   39,698.50x = 3,184,175,612.25
5. Step 5: Solve for x
   x = 3,184,175,612.25/39,698.50
6. Step 6: Final answer
   x = 80,208.97