Finding the Fourth Proportional to 1,368.78, 2,052.72 and 753.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.78 : 2,052.72 = 753.18 : x
2. Step 2: Convert to fraction form
   1,368.78/2,052.72 = 753.18/x
3. Step 3: Cross multiply
   1,368.78x = 2,052.72 × 753.18
4. Step 4: Simplify right side
   1,368.78x = 1,546,067.65
5. Step 5: Solve for x
   x = 1,546,067.65/1,368.78
6. Step 6: Final answer
   x = 1,129.52