Finding the Third Proportional to 64,682.93 and 90,640.27

Step by Step Solution

1. Step 1: Write the proportion equation
   64,682.93 : 90,640.27 = 90,640.27 : x
2. Step 2: Convert to fraction form
   64,682.93/90,640.27 = 90,640.27/x
3. Step 3: Cross multiply
   64,682.93x = 90,640.27 × 90,640.27
4. Step 4: Simplify right side
   64,682.93x = 8,215,657,752.57
5. Step 5: Solve for x
   x = 8,215,657,752.57/64,682.93
6. Step 6: Final answer
   x = 127,014.31