Finding the Fourth Proportional to 1,671.60, 2,510.10 and 978.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.60 : 2,510.10 = 978.83 : x
2. Step 2: Convert to fraction form
   1,671.60/2,510.10 = 978.83/x
3. Step 3: Cross multiply
   1,671.60x = 2,510.10 × 978.83
4. Step 4: Simplify right side
   1,671.60x = 2,456,948.63
5. Step 5: Solve for x
   x = 2,456,948.63/1,671.60
6. Step 6: Final answer
   x = 1,469.82