Finding the Third Proportional to 1,015,990 and 1,393,200

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,990 : 1,393,200 = 1,393,200 : x
2. Step 2: Convert to fraction form
   1,015,990/1,393,200 = 1,393,200/x
3. Step 3: Cross multiply
   1,015,990x = 1,393,200 × 1,393,200
4. Step 4: Simplify right side
   1,015,990x = 1,941,006,240,000
5. Step 5: Solve for x
   x = 1,941,006,240,000/1,015,990
6. Step 6: Final answer
   x = 1,910,458.02