Finding the Fourth Proportional to 1,910.56, 2,863.98 and 987.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.56 : 2,863.98 = 987.16 : x
2. Step 2: Convert to fraction form
   1,910.56/2,863.98 = 987.16/x
3. Step 3: Cross multiply
   1,910.56x = 2,863.98 × 987.16
4. Step 4: Simplify right side
   1,910.56x = 2,827,206.50
5. Step 5: Solve for x
   x = 2,827,206.50/1,910.56
6. Step 6: Final answer
   x = 1,479.78