Finding the Third Proportional to 249,557 and 387,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,557 : 387,871.50 = 387,871.50 : x
2. Step 2: Convert to fraction form
   249,557/387,871.50 = 387,871.50/x
3. Step 3: Cross multiply
   249,557x = 387,871.50 × 387,871.50
4. Step 4: Simplify right side
   249,557x = 150,444,300,512.25
5. Step 5: Solve for x
   x = 150,444,300,512.25/249,557
6. Step 6: Final answer
   x = 602,845.44