Finding the Third Proportional to 618,258 and 1,345,390

Step by Step Solution

1. Step 1: Write the proportion equation
   618,258 : 1,345,390 = 1,345,390 : x
2. Step 2: Convert to fraction form
   618,258/1,345,390 = 1,345,390/x
3. Step 3: Cross multiply
   618,258x = 1,345,390 × 1,345,390
4. Step 4: Simplify right side
   618,258x = 1,810,074,252,100
5. Step 5: Solve for x
   x = 1,810,074,252,100/618,258
6. Step 6: Final answer
   x = 2,927,700.49