Finding the Third Proportional to 64,210.50 and 85,200

Step by Step Solution

1. Step 1: Write the proportion equation
   64,210.50 : 85,200 = 85,200 : x
2. Step 2: Convert to fraction form
   64,210.50/85,200 = 85,200/x
3. Step 3: Cross multiply
   64,210.50x = 85,200 × 85,200
4. Step 4: Simplify right side
   64,210.50x = 7,259,040,000
5. Step 5: Solve for x
   x = 7,259,040,000/64,210.50
6. Step 6: Final answer
   x = 113,050.67