Finding the Third Proportional to 891,034 and 1,287,391

Step by Step Solution

1. Step 1: Write the proportion equation
   891,034 : 1,287,391 = 1,287,391 : x
2. Step 2: Convert to fraction form
   891,034/1,287,391 = 1,287,391/x
3. Step 3: Cross multiply
   891,034x = 1,287,391 × 1,287,391
4. Step 4: Simplify right side
   891,034x = 1,657,375,586,881
5. Step 5: Solve for x
   x = 1,657,375,586,881/891,034
6. Step 6: Final answer
   x = 1,860,058.75