Finding the Fourth Proportional to 1,773.40, 2,661.30 and 1,155.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.40 : 2,661.30 = 1,155.60 : x
2. Step 2: Convert to fraction form
   1,773.40/2,661.30 = 1,155.60/x
3. Step 3: Cross multiply
   1,773.40x = 2,661.30 × 1,155.60
4. Step 4: Simplify right side
   1,773.40x = 3,075,398.28
5. Step 5: Solve for x
   x = 3,075,398.28/1,773.40
6. Step 6: Final answer
   x = 1,734.18