Finding the Fourth Proportional to 1,155.94, 1,594.72 and 840.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.94 : 1,594.72 = 840.51 : x
2. Step 2: Convert to fraction form
   1,155.94/1,594.72 = 840.51/x
3. Step 3: Cross multiply
   1,155.94x = 1,594.72 × 840.51
4. Step 4: Simplify right side
   1,155.94x = 1,340,373.90
5. Step 5: Solve for x
   x = 1,340,373.90/1,155.94
6. Step 6: Final answer
   x = 1,159.56