Finding the Third Proportional to 42,628.50 and 66,726

Step by Step Solution

1. Step 1: Write the proportion equation
   42,628.50 : 66,726 = 66,726 : x
2. Step 2: Convert to fraction form
   42,628.50/66,726 = 66,726/x
3. Step 3: Cross multiply
   42,628.50x = 66,726 × 66,726
4. Step 4: Simplify right side
   42,628.50x = 4,452,359,076
5. Step 5: Solve for x
   x = 4,452,359,076/42,628.50
6. Step 6: Final answer
   x = 104,445.60