Finding the Fourth Proportional to 2,086.14, 3,124.96 and 987.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.14 : 3,124.96 = 987.18 : x
2. Step 2: Convert to fraction form
   2,086.14/3,124.96 = 987.18/x
3. Step 3: Cross multiply
   2,086.14x = 3,124.96 × 987.18
4. Step 4: Simplify right side
   2,086.14x = 3,084,898.01
5. Step 5: Solve for x
   x = 3,084,898.01/2,086.14
6. Step 6: Final answer
   x = 1,478.76