Finding the Fourth Proportional to 1,587.56, 2,190.82 and 1,366.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.56 : 2,190.82 = 1,366.12 : x
2. Step 2: Convert to fraction form
   1,587.56/2,190.82 = 1,366.12/x
3. Step 3: Cross multiply
   1,587.56x = 2,190.82 × 1,366.12
4. Step 4: Simplify right side
   1,587.56x = 2,992,923.02
5. Step 5: Solve for x
   x = 2,992,923.02/1,587.56
6. Step 6: Final answer
   x = 1,885.23