Finding the Fourth Proportional to 1,086.15, 1,496.84 and 1,069.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.15 : 1,496.84 = 1,069.95 : x
2. Step 2: Convert to fraction form
   1,086.15/1,496.84 = 1,069.95/x
3. Step 3: Cross multiply
   1,086.15x = 1,496.84 × 1,069.95
4. Step 4: Simplify right side
   1,086.15x = 1,601,538.61
5. Step 5: Solve for x
   x = 1,601,538.61/1,086.15
6. Step 6: Final answer
   x = 1,474.51