Finding the Fourth Proportional to 2,058,069.78, 3,085,456.12 and 978,040.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,058,069.78 : 3,085,456.12 = 978,040.35 : x
2. Step 2: Convert to fraction form
   2,058,069.78/3,085,456.12 = 978,040.35/x
3. Step 3: Cross multiply
   2,058,069.78x = 3,085,456.12 × 978,040.35
4. Step 4: Simplify right side
   2,058,069.78x = 3,017,700,581,069.34
5. Step 5: Solve for x
   x = 3,017,700,581,069.34/2,058,069.78
6. Step 6: Final answer
   x = 1,466,277.10