Finding the Fourth Proportional to 1,928.55, 2,661.39 and 1,089.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.55 : 2,661.39 = 1,089.25 : x
2. Step 2: Convert to fraction form
   1,928.55/2,661.39 = 1,089.25/x
3. Step 3: Cross multiply
   1,928.55x = 2,661.39 × 1,089.25
4. Step 4: Simplify right side
   1,928.55x = 2,898,913.61
5. Step 5: Solve for x
   x = 2,898,913.61/1,928.55
6. Step 6: Final answer
   x = 1,503.16