Finding the Third Proportional to 345,123 and 741,478.13

Step by Step Solution

1. Step 1: Write the proportion equation
   345,123 : 741,478.13 = 741,478.13 : x
2. Step 2: Convert to fraction form
   345,123/741,478.13 = 741,478.13/x
3. Step 3: Cross multiply
   345,123x = 741,478.13 × 741,478.13
4. Step 4: Simplify right side
   345,123x = 549,789,809,853.52
5. Step 5: Solve for x
   x = 549,789,809,853.52/345,123
6. Step 6: Final answer
   x = 1,593,025.70