Finding the Third Proportional to 64,480.50 and 142,038

Step by Step Solution

1. Step 1: Write the proportion equation
   64,480.50 : 142,038 = 142,038 : x
2. Step 2: Convert to fraction form
   64,480.50/142,038 = 142,038/x
3. Step 3: Cross multiply
   64,480.50x = 142,038 × 142,038
4. Step 4: Simplify right side
   64,480.50x = 20,174,793,444
5. Step 5: Solve for x
   x = 20,174,793,444/64,480.50
6. Step 6: Final answer
   x = 312,882.09