Finding the Third Proportional to 66,018.50 and 142,559

Step by Step Solution

1. Step 1: Write the proportion equation
   66,018.50 : 142,559 = 142,559 : x
2. Step 2: Convert to fraction form
   66,018.50/142,559 = 142,559/x
3. Step 3: Cross multiply
   66,018.50x = 142,559 × 142,559
4. Step 4: Simplify right side
   66,018.50x = 20,323,068,481
5. Step 5: Solve for x
   x = 20,323,068,481/66,018.50
6. Step 6: Final answer
   x = 307,838.99