Finding the Fourth Proportional to 1,167.77, 1,749.30 and 581.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.77 : 1,749.30 = 581.00 : x
2. Step 2: Convert to fraction form
   1,167.77/1,749.30 = 581.00/x
3. Step 3: Cross multiply
   1,167.77x = 1,749.30 × 581.00
4. Step 4: Simplify right side
   1,167.77x = 1,016,334.55
5. Step 5: Solve for x
   x = 1,016,334.55/1,167.77
6. Step 6: Final answer
   x = 870.32