Finding the Fourth Proportional to 1,587.15, 2,189.54 and 923.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.15 : 2,189.54 = 923.82 : x
2. Step 2: Convert to fraction form
   1,587.15/2,189.54 = 923.82/x
3. Step 3: Cross multiply
   1,587.15x = 2,189.54 × 923.82
4. Step 4: Simplify right side
   1,587.15x = 2,022,736.22
5. Step 5: Solve for x
   x = 2,022,736.22/1,587.15
6. Step 6: Final answer
   x = 1,274.45