Finding the Fourth Proportional to 1,291.55, 1,784.23 and 1,116.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.55 : 1,784.23 = 1,116.59 : x
2. Step 2: Convert to fraction form
   1,291.55/1,784.23 = 1,116.59/x
3. Step 3: Cross multiply
   1,291.55x = 1,784.23 × 1,116.59
4. Step 4: Simplify right side
   1,291.55x = 1,992,241.66
5. Step 5: Solve for x
   x = 1,992,241.66/1,291.55
6. Step 6: Final answer
   x = 1,542.53