Finding the Fourth Proportional to 1,100.28, 1,518.06 and 961.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.28 : 1,518.06 = 961.80 : x
2. Step 2: Convert to fraction form
   1,100.28/1,518.06 = 961.80/x
3. Step 3: Cross multiply
   1,100.28x = 1,518.06 × 961.80
4. Step 4: Simplify right side
   1,100.28x = 1,460,070.11
5. Step 5: Solve for x
   x = 1,460,070.11/1,100.28
6. Step 6: Final answer
   x = 1,327.00