Finding the Fourth Proportional to 2,660,616.30, 3,990,924.45 and 978,926.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,616.30 : 3,990,924.45 = 978,926.70 : x
2. Step 2: Convert to fraction form
   2,660,616.30/3,990,924.45 = 978,926.70/x
3. Step 3: Cross multiply
   2,660,616.30x = 3,990,924.45 × 978,926.70
4. Step 4: Simplify right side
   2,660,616.30x = 3,906,822,501,787.82
5. Step 5: Solve for x
   x = 3,906,822,501,787.82/2,660,616.30
6. Step 6: Final answer
   x = 1,468,390.05