Finding the Fourth Proportional to 1,587.86, 2,191.83 and 1,194.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.86 : 2,191.83 = 1,194.20 : x
2. Step 2: Convert to fraction form
   1,587.86/2,191.83 = 1,194.20/x
3. Step 3: Cross multiply
   1,587.86x = 2,191.83 × 1,194.20
4. Step 4: Simplify right side
   1,587.86x = 2,617,483.39
5. Step 5: Solve for x
   x = 2,617,483.39/1,587.86
6. Step 6: Final answer
   x = 1,648.43