Finding the Third Proportional to 64,221.75 and 85,214.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,221.75 : 85,214.63 = 85,214.63 : x
2. Step 2: Convert to fraction form
   64,221.75/85,214.63 = 85,214.63/x
3. Step 3: Cross multiply
   64,221.75x = 85,214.63 × 85,214.63
4. Step 4: Simplify right side
   64,221.75x = 7,261,532,313.89
5. Step 5: Solve for x
   x = 7,261,532,313.89/64,221.75
6. Step 6: Final answer
   x = 113,069.67