Finding the Third Proportional to 64,975.50 and 142,359

Step by Step Solution

1. Step 1: Write the proportion equation
   64,975.50 : 142,359 = 142,359 : x
2. Step 2: Convert to fraction form
   64,975.50/142,359 = 142,359/x
3. Step 3: Cross multiply
   64,975.50x = 142,359 × 142,359
4. Step 4: Simplify right side
   64,975.50x = 20,266,084,881
5. Step 5: Solve for x
   x = 20,266,084,881/64,975.50
6. Step 6: Final answer
   x = 311,903.48