Finding the Fourth Proportional to 1,165.52, 1,746.60 and 890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.52 : 1,746.60 = 890.72 : x
2. Step 2: Convert to fraction form
   1,165.52/1,746.60 = 890.72/x
3. Step 3: Cross multiply
   1,165.52x = 1,746.60 × 890.72
4. Step 4: Simplify right side
   1,165.52x = 1,555,731.55
5. Step 5: Solve for x
   x = 1,555,731.55/1,165.52
6. Step 6: Final answer
   x = 1,334.80