Finding the Third Proportional to 252,570 and 390,114

Step by Step Solution

1. Step 1: Write the proportion equation
   252,570 : 390,114 = 390,114 : x
2. Step 2: Convert to fraction form
   252,570/390,114 = 390,114/x
3. Step 3: Cross multiply
   252,570x = 390,114 × 390,114
4. Step 4: Simplify right side
   252,570x = 152,188,932,996
5. Step 5: Solve for x
   x = 152,188,932,996/252,570
6. Step 6: Final answer
   x = 602,561.40