Finding the Third Proportional to 868,590 and 1,253,070

Step by Step Solution

1. Step 1: Write the proportion equation
   868,590 : 1,253,070 = 1,253,070 : x
2. Step 2: Convert to fraction form
   868,590/1,253,070 = 1,253,070/x
3. Step 3: Cross multiply
   868,590x = 1,253,070 × 1,253,070
4. Step 4: Simplify right side
   868,590x = 1,570,184,424,900
5. Step 5: Solve for x
   x = 1,570,184,424,900/868,590
6. Step 6: Final answer
   x = 1,807,739.47