Finding the Fourth Proportional to 1,603.27, 2,211.86 and 904.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.27 : 2,211.86 = 904.51 : x
2. Step 2: Convert to fraction form
   1,603.27/2,211.86 = 904.51/x
3. Step 3: Cross multiply
   1,603.27x = 2,211.86 × 904.51
4. Step 4: Simplify right side
   1,603.27x = 2,000,642.83
5. Step 5: Solve for x
   x = 2,000,642.83/1,603.27
6. Step 6: Final answer
   x = 1,247.85