Finding the Third Proportional to 191,312 and 242,570

Step by Step Solution

1. Step 1: Write the proportion equation
   191,312 : 242,570 = 242,570 : x
2. Step 2: Convert to fraction form
   191,312/242,570 = 242,570/x
3. Step 3: Cross multiply
   191,312x = 242,570 × 242,570
4. Step 4: Simplify right side
   191,312x = 58,840,204,900
5. Step 5: Solve for x
   x = 58,840,204,900/191,312
6. Step 6: Final answer
   x = 307,561.50