Finding the Third Proportional to 45,139.50 and 68,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   45,139.50 : 68,669.50 = 68,669.50 : x
2. Step 2: Convert to fraction form
   45,139.50/68,669.50 = 68,669.50/x
3. Step 3: Cross multiply
   45,139.50x = 68,669.50 × 68,669.50
4. Step 4: Simplify right side
   45,139.50x = 4,715,500,230.25
5. Step 5: Solve for x
   x = 4,715,500,230.25/45,139.50
6. Step 6: Final answer
   x = 104,465.05