Finding the Third Proportional to 66,380.50 and 143,362

Step by Step Solution

1. Step 1: Write the proportion equation
   66,380.50 : 143,362 = 143,362 : x
2. Step 2: Convert to fraction form
   66,380.50/143,362 = 143,362/x
3. Step 3: Cross multiply
   66,380.50x = 143,362 × 143,362
4. Step 4: Simplify right side
   66,380.50x = 20,552,663,044
5. Step 5: Solve for x
   x = 20,552,663,044/66,380.50
6. Step 6: Final answer
   x = 309,618.99