Finding the Fourth Proportional to 1,089.06, 1,501.80 and 969.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.06 : 1,501.80 = 969.05 : x
2. Step 2: Convert to fraction form
   1,089.06/1,501.80 = 969.05/x
3. Step 3: Cross multiply
   1,089.06x = 1,501.80 × 969.05
4. Step 4: Simplify right side
   1,089.06x = 1,455,311.78
5. Step 5: Solve for x
   x = 1,455,311.78/1,089.06
6. Step 6: Final answer
   x = 1,336.30