Finding the Fourth Proportional to 1,145.83, 1,579.71 and 910.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.83 : 1,579.71 = 910.56 : x
2. Step 2: Convert to fraction form
   1,145.83/1,579.71 = 910.56/x
3. Step 3: Cross multiply
   1,145.83x = 1,579.71 × 910.56
4. Step 4: Simplify right side
   1,145.83x = 1,438,420.74
5. Step 5: Solve for x
   x = 1,438,420.74/1,145.83
6. Step 6: Final answer
   x = 1,255.35