Finding the Fourth Proportional to 1,843.29, 2,766.15 and 978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,843.29 : 2,766.15 = 978.21 : x
2. Step 2: Convert to fraction form
   1,843.29/2,766.15 = 978.21/x
3. Step 3: Cross multiply
   1,843.29x = 2,766.15 × 978.21
4. Step 4: Simplify right side
   1,843.29x = 2,705,875.59
5. Step 5: Solve for x
   x = 2,705,875.59/1,843.29
6. Step 6: Final answer
   x = 1,467.96