Finding the Third Proportional to 688,036.50 and 1,490,890

Step by Step Solution

1. Step 1: Write the proportion equation
   688,036.50 : 1,490,890 = 1,490,890 : x
2. Step 2: Convert to fraction form
   688,036.50/1,490,890 = 1,490,890/x
3. Step 3: Cross multiply
   688,036.50x = 1,490,890 × 1,490,890
4. Step 4: Simplify right side
   688,036.50x = 2,222,752,992,100
5. Step 5: Solve for x
   x = 2,222,752,992,100/688,036.50
6. Step 6: Final answer
   x = 3,230,574.24