Finding the Fourth Proportional to 1,569.68, 2,353.59 and 919.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.68 : 2,353.59 = 919.05 : x
2. Step 2: Convert to fraction form
   1,569.68/2,353.59 = 919.05/x
3. Step 3: Cross multiply
   1,569.68x = 2,353.59 × 919.05
4. Step 4: Simplify right side
   1,569.68x = 2,163,066.89
5. Step 5: Solve for x
   x = 2,163,066.89/1,569.68
6. Step 6: Final answer
   x = 1,378.03