Finding the Third Proportional to 64,855 and 142,011.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,855 : 142,011.50 = 142,011.50 : x
2. Step 2: Convert to fraction form
   64,855/142,011.50 = 142,011.50/x
3. Step 3: Cross multiply
   64,855x = 142,011.50 × 142,011.50
4. Step 4: Simplify right side
   64,855x = 20,167,266,132.25
5. Step 5: Solve for x
   x = 20,167,266,132.25/64,855
6. Step 6: Final answer
   x = 310,959.31