Finding the Third Proportional to 66,487.25 and 142,314.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,487.25 : 142,314.25 = 142,314.25 : x
2. Step 2: Convert to fraction form
   66,487.25/142,314.25 = 142,314.25/x
3. Step 3: Cross multiply
   66,487.25x = 142,314.25 × 142,314.25
4. Step 4: Simplify right side
   66,487.25x = 20,253,345,753.06
5. Step 5: Solve for x
   x = 20,253,345,753.06/66,487.25
6. Step 6: Final answer
   x = 304,619.99