Finding the Fourth Proportional to 1,488.87, 2,230.45 and 904.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.87 : 2,230.45 = 904.05 : x
2. Step 2: Convert to fraction form
   1,488.87/2,230.45 = 904.05/x
3. Step 3: Cross multiply
   1,488.87x = 2,230.45 × 904.05
4. Step 4: Simplify right side
   1,488.87x = 2,016,438.32
5. Step 5: Solve for x
   x = 2,016,438.32/1,488.87
6. Step 6: Final answer
   x = 1,354.34