Finding the Fourth Proportional to 2,164.82, 2,987.60 and 1,281.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.82 : 2,987.60 = 1,281.13 : x
2. Step 2: Convert to fraction form
   2,164.82/2,987.60 = 1,281.13/x
3. Step 3: Cross multiply
   2,164.82x = 2,987.60 × 1,281.13
4. Step 4: Simplify right side
   2,164.82x = 3,827,490.11
5. Step 5: Solve for x
   x = 3,827,490.11/2,164.82
6. Step 6: Final answer
   x = 1,768.04