Finding the Third Proportional to 152,212 and 243,078

Step by Step Solution

1. Step 1: Write the proportion equation
   152,212 : 243,078 = 243,078 : x
2. Step 2: Convert to fraction form
   152,212/243,078 = 243,078/x
3. Step 3: Cross multiply
   152,212x = 243,078 × 243,078
4. Step 4: Simplify right side
   152,212x = 59,086,914,084
5. Step 5: Solve for x
   x = 59,086,914,084/152,212
6. Step 6: Final answer
   x = 388,188.28