Finding the Fourth Proportional to 1,890.32, 2,608.56 and 1,104.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.32 : 2,608.56 = 1,104.20 : x
2. Step 2: Convert to fraction form
   1,890.32/2,608.56 = 1,104.20/x
3. Step 3: Cross multiply
   1,890.32x = 2,608.56 × 1,104.20
4. Step 4: Simplify right side
   1,890.32x = 2,880,371.95
5. Step 5: Solve for x
   x = 2,880,371.95/1,890.32
6. Step 6: Final answer
   x = 1,523.75