Finding the Fourth Proportional to 1,987.94, 2,985.05 and 1,296.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.94 : 2,985.05 = 1,296.27 : x
2. Step 2: Convert to fraction form
   1,987.94/2,985.05 = 1,296.27/x
3. Step 3: Cross multiply
   1,987.94x = 2,985.05 × 1,296.27
4. Step 4: Simplify right side
   1,987.94x = 3,869,434.00
5. Step 5: Solve for x
   x = 3,869,434.00/1,987.94
6. Step 6: Final answer
   x = 1,946.45