Finding the Fourth Proportional to 1,478.86, 2,041.86 and 919.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.86 : 2,041.86 = 919.56 : x
2. Step 2: Convert to fraction form
   1,478.86/2,041.86 = 919.56/x
3. Step 3: Cross multiply
   1,478.86x = 2,041.86 × 919.56
4. Step 4: Simplify right side
   1,478.86x = 1,877,612.78
5. Step 5: Solve for x
   x = 1,877,612.78/1,478.86
6. Step 6: Final answer
   x = 1,269.64