Finding the Fourth Proportional to 1,155.84, 1,595.28 and 1,085.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.84 : 1,595.28 = 1,085.51 : x
2. Step 2: Convert to fraction form
   1,155.84/1,595.28 = 1,085.51/x
3. Step 3: Cross multiply
   1,155.84x = 1,595.28 × 1,085.51
4. Step 4: Simplify right side
   1,155.84x = 1,731,692.39
5. Step 5: Solve for x
   x = 1,731,692.39/1,155.84
6. Step 6: Final answer
   x = 1,498.21