Finding the Fourth Proportional to 1,069.81, 1,474.72 and 836.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.81 : 1,474.72 = 836.53 : x
2. Step 2: Convert to fraction form
   1,069.81/1,474.72 = 836.53/x
3. Step 3: Cross multiply
   1,069.81x = 1,474.72 × 836.53
4. Step 4: Simplify right side
   1,069.81x = 1,233,647.52
5. Step 5: Solve for x
   x = 1,233,647.52/1,069.81
6. Step 6: Final answer
   x = 1,153.15