Finding the Fourth Proportional to 3,394.78, 5,091.90 and 1,054.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,394.78 : 5,091.90 = 1,054.69 : x
2. Step 2: Convert to fraction form
   3,394.78/5,091.90 = 1,054.69/x
3. Step 3: Cross multiply
   3,394.78x = 5,091.90 × 1,054.69
4. Step 4: Simplify right side
   3,394.78x = 5,370,376.01
5. Step 5: Solve for x
   x = 5,370,376.01/3,394.78
6. Step 6: Final answer
   x = 1,581.95