Finding the Third Proportional to 156,744 and 342,890

Step by Step Solution

1. Step 1: Write the proportion equation
   156,744 : 342,890 = 342,890 : x
2. Step 2: Convert to fraction form
   156,744/342,890 = 342,890/x
3. Step 3: Cross multiply
   156,744x = 342,890 × 342,890
4. Step 4: Simplify right side
   156,744x = 117,573,552,100
5. Step 5: Solve for x
   x = 117,573,552,100/156,744
6. Step 6: Final answer
   x = 750,099.22