Finding the Fourth Proportional to 2,659.37, 3,987.36 and 904.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.37 : 3,987.36 = 904.23 : x
2. Step 2: Convert to fraction form
   2,659.37/3,987.36 = 904.23/x
3. Step 3: Cross multiply
   2,659.37x = 3,987.36 × 904.23
4. Step 4: Simplify right side
   2,659.37x = 3,605,490.53
5. Step 5: Solve for x
   x = 3,605,490.53/2,659.37
6. Step 6: Final answer
   x = 1,355.77