Finding the Third Proportional to 813,312 and 1,258,200

Step by Step Solution

1. Step 1: Write the proportion equation
   813,312 : 1,258,200 = 1,258,200 : x
2. Step 2: Convert to fraction form
   813,312/1,258,200 = 1,258,200/x
3. Step 3: Cross multiply
   813,312x = 1,258,200 × 1,258,200
4. Step 4: Simplify right side
   813,312x = 1,583,067,240,000
5. Step 5: Solve for x
   x = 1,583,067,240,000/813,312
6. Step 6: Final answer
   x = 1,946,445.20