Finding the Third Proportional to 345,078.75 and 706,890

Step by Step Solution

1. Step 1: Write the proportion equation
   345,078.75 : 706,890 = 706,890 : x
2. Step 2: Convert to fraction form
   345,078.75/706,890 = 706,890/x
3. Step 3: Cross multiply
   345,078.75x = 706,890 × 706,890
4. Step 4: Simplify right side
   345,078.75x = 499,693,472,100
5. Step 5: Solve for x
   x = 499,693,472,100/345,078.75
6. Step 6: Final answer
   x = 1,448,056.34