Finding the Fourth Proportional to 2,484.69, 3,726.27 and 840.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,484.69 : 3,726.27 = 840.80 : x
2. Step 2: Convert to fraction form
   2,484.69/3,726.27 = 840.80/x
3. Step 3: Cross multiply
   2,484.69x = 3,726.27 × 840.80
4. Step 4: Simplify right side
   2,484.69x = 3,133,029.18
5. Step 5: Solve for x
   x = 3,133,029.18/2,484.69
6. Step 6: Final answer
   x = 1,260.93