Finding the Third Proportional to 618,258 and 1,345,387.50

Step by Step Solution

1. Step 1: Write the proportion equation
   618,258 : 1,345,387.50 = 1,345,387.50 : x
2. Step 2: Convert to fraction form
   618,258/1,345,387.50 = 1,345,387.50/x
3. Step 3: Cross multiply
   618,258x = 1,345,387.50 × 1,345,387.50
4. Step 4: Simplify right side
   618,258x = 1,810,067,525,156.25
5. Step 5: Solve for x
   x = 1,810,067,525,156.25/618,258
6. Step 6: Final answer
   x = 2,927,689.61