Finding the Fourth Proportional to 1,109.87, 1,530.25 and 899.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.87 : 1,530.25 = 899.27 : x
2. Step 2: Convert to fraction form
   1,109.87/1,530.25 = 899.27/x
3. Step 3: Cross multiply
   1,109.87x = 1,530.25 × 899.27
4. Step 4: Simplify right side
   1,109.87x = 1,376,103.76
5. Step 5: Solve for x
   x = 1,376,103.76/1,109.87
6. Step 6: Final answer
   x = 1,239.88