Finding the Third Proportional to 156,290 and 342,388

Step by Step Solution

1. Step 1: Write the proportion equation
   156,290 : 342,388 = 342,388 : x
2. Step 2: Convert to fraction form
   156,290/342,388 = 342,388/x
3. Step 3: Cross multiply
   156,290x = 342,388 × 342,388
4. Step 4: Simplify right side
   156,290x = 117,229,542,544
5. Step 5: Solve for x
   x = 117,229,542,544/156,290
6. Step 6: Final answer
   x = 750,077.05