Finding the Fourth Proportional to 1,928.84, 2,661.74 and 1,089.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.84 : 2,661.74 = 1,089.53 : x
2. Step 2: Convert to fraction form
   1,928.84/2,661.74 = 1,089.53/x
3. Step 3: Cross multiply
   1,928.84x = 2,661.74 × 1,089.53
4. Step 4: Simplify right side
   1,928.84x = 2,900,045.58
5. Step 5: Solve for x
   x = 2,900,045.58/1,928.84
6. Step 6: Final answer
   x = 1,503.52