Finding the Fourth Proportional to 3,981,726.15, 5,972,610.55 and 989,910.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981,726.15 : 5,972,610.55 = 989,910.15 : x
2. Step 2: Convert to fraction form
   3,981,726.15/5,972,610.55 = 989,910.15/x
3. Step 3: Cross multiply
   3,981,726.15x = 5,972,610.55 × 989,910.15
4. Step 4: Simplify right side
   3,981,726.15x = 5,912,347,775,579.03
5. Step 5: Solve for x
   x = 5,912,347,775,579.03/3,981,726.15
6. Step 6: Final answer
   x = 1,484,870.52