Finding the Third Proportional to 65,458.50 and 142,581

Step by Step Solution

1. Step 1: Write the proportion equation
   65,458.50 : 142,581 = 142,581 : x
2. Step 2: Convert to fraction form
   65,458.50/142,581 = 142,581/x
3. Step 3: Cross multiply
   65,458.50x = 142,581 × 142,581
4. Step 4: Simplify right side
   65,458.50x = 20,329,341,561
5. Step 5: Solve for x
   x = 20,329,341,561/65,458.50
6. Step 6: Final answer
   x = 310,568.40