Finding the Third Proportional to 654,448 and 1,387,988

Step by Step Solution

1. Step 1: Write the proportion equation
   654,448 : 1,387,988 = 1,387,988 : x
2. Step 2: Convert to fraction form
   654,448/1,387,988 = 1,387,988/x
3. Step 3: Cross multiply
   654,448x = 1,387,988 × 1,387,988
4. Step 4: Simplify right side
   654,448x = 1,926,510,688,144
5. Step 5: Solve for x
   x = 1,926,510,688,144/654,448
6. Step 6: Final answer
   x = 2,943,718.50