Finding the Fourth Proportional to 1,338.13, 2,003.55 and 904.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.13 : 2,003.55 = 904.42 : x
2. Step 2: Convert to fraction form
   1,338.13/2,003.55 = 904.42/x
3. Step 3: Cross multiply
   1,338.13x = 2,003.55 × 904.42
4. Step 4: Simplify right side
   1,338.13x = 1,812,050.69
5. Step 5: Solve for x
   x = 1,812,050.69/1,338.13
6. Step 6: Final answer
   x = 1,354.17