Finding the Fourth Proportional to 2,086.89, 3,126.08 and 987.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.89 : 3,126.08 = 987.93 : x
2. Step 2: Convert to fraction form
   2,086.89/3,126.08 = 987.93/x
3. Step 3: Cross multiply
   2,086.89x = 3,126.08 × 987.93
4. Step 4: Simplify right side
   2,086.89x = 3,088,348.21
5. Step 5: Solve for x
   x = 3,088,348.21/2,086.89
6. Step 6: Final answer
   x = 1,479.88