Finding the Third Proportional to 64,426 and 90,726

Step by Step Solution

1. Step 1: Write the proportion equation
   64,426 : 90,726 = 90,726 : x
2. Step 2: Convert to fraction form
   64,426/90,726 = 90,726/x
3. Step 3: Cross multiply
   64,426x = 90,726 × 90,726
4. Step 4: Simplify right side
   64,426x = 8,231,207,076
5. Step 5: Solve for x
   x = 8,231,207,076/64,426
6. Step 6: Final answer
   x = 127,762.19