Finding the Third Proportional to 637,258 and 1,390,454

Step by Step Solution

1. Step 1: Write the proportion equation
   637,258 : 1,390,454 = 1,390,454 : x
2. Step 2: Convert to fraction form
   637,258/1,390,454 = 1,390,454/x
3. Step 3: Cross multiply
   637,258x = 1,390,454 × 1,390,454
4. Step 4: Simplify right side
   637,258x = 1,933,362,326,116
5. Step 5: Solve for x
   x = 1,933,362,326,116/637,258
6. Step 6: Final answer
   x = 3,033,876.90