Finding the Third Proportional to 26,465.50 and 42,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   26,465.50 : 42,128.50 = 42,128.50 : x
2. Step 2: Convert to fraction form
   26,465.50/42,128.50 = 42,128.50/x
3. Step 3: Cross multiply
   26,465.50x = 42,128.50 × 42,128.50
4. Step 4: Simplify right side
   26,465.50x = 1,774,810,512.25
5. Step 5: Solve for x
   x = 1,774,810,512.25/26,465.50
6. Step 6: Final answer
   x = 67,061.29