Finding the Third Proportional to 66,646.50 and 140,784

Step by Step Solution

1. Step 1: Write the proportion equation
   66,646.50 : 140,784 = 140,784 : x
2. Step 2: Convert to fraction form
   66,646.50/140,784 = 140,784/x
3. Step 3: Cross multiply
   66,646.50x = 140,784 × 140,784
4. Step 4: Simplify right side
   66,646.50x = 19,820,134,656
5. Step 5: Solve for x
   x = 19,820,134,656/66,646.50
6. Step 6: Final answer
   x = 297,391.98