Finding the Third Proportional to 65,719.50 and 142,510.88

Step by Step Solution

1. Step 1: Write the proportion equation
   65,719.50 : 142,510.88 = 142,510.88 : x
2. Step 2: Convert to fraction form
   65,719.50/142,510.88 = 142,510.88/x
3. Step 3: Cross multiply
   65,719.50x = 142,510.88 × 142,510.88
4. Step 4: Simplify right side
   65,719.50x = 20,309,349,493.27
5. Step 5: Solve for x
   x = 20,309,349,493.27/65,719.50
6. Step 6: Final answer
   x = 309,030.80