Finding the Third Proportional to 156,554 and 342,648

Step by Step Solution

1. Step 1: Write the proportion equation
   156,554 : 342,648 = 342,648 : x
2. Step 2: Convert to fraction form
   156,554/342,648 = 342,648/x
3. Step 3: Cross multiply
   156,554x = 342,648 × 342,648
4. Step 4: Simplify right side
   156,554x = 117,407,651,904
5. Step 5: Solve for x
   x = 117,407,651,904/156,554
6. Step 6: Final answer
   x = 749,949.87