Finding the Fourth Proportional to 1,611.39, 2,225.52 and 1,086.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.39 : 2,225.52 = 1,086.51 : x
2. Step 2: Convert to fraction form
   1,611.39/2,225.52 = 1,086.51/x
3. Step 3: Cross multiply
   1,611.39x = 2,225.52 × 1,086.51
4. Step 4: Simplify right side
   1,611.39x = 2,418,049.74
5. Step 5: Solve for x
   x = 2,418,049.74/1,611.39
6. Step 6: Final answer
   x = 1,500.60