Finding the Fourth Proportional to 1,788, 2,466.72 and 1,089.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788 : 2,466.72 = 1,089.12 : x
2. Step 2: Convert to fraction form
   1,788/2,466.72 = 1,089.12/x
3. Step 3: Cross multiply
   1,788x = 2,466.72 × 1,089.12
4. Step 4: Simplify right side
   1,788x = 2,686,554.09
5. Step 5: Solve for x
   x = 2,686,554.09/1,788
6. Step 6: Final answer
   x = 1,502.55