Finding the Fourth Proportional to 2,074.29, 3,109.89 and 904.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.29 : 3,109.89 = 904.07 : x
2. Step 2: Convert to fraction form
   2,074.29/3,109.89 = 904.07/x
3. Step 3: Cross multiply
   2,074.29x = 3,109.89 × 904.07
4. Step 4: Simplify right side
   2,074.29x = 2,811,566.03
5. Step 5: Solve for x
   x = 2,811,566.03/2,074.29
6. Step 6: Final answer
   x = 1,355.44