Finding the Third Proportional to 54,247.50 and 83,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,247.50 : 83,434.50 = 83,434.50 : x
2. Step 2: Convert to fraction form
   54,247.50/83,434.50 = 83,434.50/x
3. Step 3: Cross multiply
   54,247.50x = 83,434.50 × 83,434.50
4. Step 4: Simplify right side
   54,247.50x = 6,961,315,790.25
5. Step 5: Solve for x
   x = 6,961,315,790.25/54,247.50
6. Step 6: Final answer
   x = 128,325.10