Finding the Third Proportional to 243,900 and 375,570

Step by Step Solution

1. Step 1: Write the proportion equation
   243,900 : 375,570 = 375,570 : x
2. Step 2: Convert to fraction form
   243,900/375,570 = 375,570/x
3. Step 3: Cross multiply
   243,900x = 375,570 × 375,570
4. Step 4: Simplify right side
   243,900x = 141,052,824,900
5. Step 5: Solve for x
   x = 141,052,824,900/243,900
6. Step 6: Final answer
   x = 578,322.37