Finding the Fourth Proportional to 1,752.10, 2,418.72 and 1,089.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,752.10 : 2,418.72 = 1,089.40 : x
2. Step 2: Convert to fraction form
   1,752.10/2,418.72 = 1,089.40/x
3. Step 3: Cross multiply
   1,752.10x = 2,418.72 × 1,089.40
4. Step 4: Simplify right side
   1,752.10x = 2,634,953.57
5. Step 5: Solve for x
   x = 2,634,953.57/1,752.10
6. Step 6: Final answer
   x = 1,503.88