Finding the Third Proportional to 262,440 and 388,124.16

Step by Step Solution

1. Step 1: Write the proportion equation
   262,440 : 388,124.16 = 388,124.16 : x
2. Step 2: Convert to fraction form
   262,440/388,124.16 = 388,124.16/x
3. Step 3: Cross multiply
   262,440x = 388,124.16 × 388,124.16
4. Step 4: Simplify right side
   262,440x = 150,640,360,664.77
5. Step 5: Solve for x
   x = 150,640,360,664.77/262,440
6. Step 6: Final answer
   x = 573,999.24