Finding the Fourth Proportional to 1,993.52, 2,987.78 and 1,263.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,993.52 : 2,987.78 = 1,263.30 : x
2. Step 2: Convert to fraction form
   1,993.52/2,987.78 = 1,263.30/x
3. Step 3: Cross multiply
   1,993.52x = 2,987.78 × 1,263.30
4. Step 4: Simplify right side
   1,993.52x = 3,774,456.16
5. Step 5: Solve for x
   x = 3,774,456.16/1,993.52
6. Step 6: Final answer
   x = 1,893.37