Finding the Fourth Proportional to 2,523.78, 3,786.72 and 1,117.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,523.78 : 3,786.72 = 1,117.47 : x
2. Step 2: Convert to fraction form
   2,523.78/3,786.72 = 1,117.47/x
3. Step 3: Cross multiply
   2,523.78x = 3,786.72 × 1,117.47
4. Step 4: Simplify right side
   2,523.78x = 4,231,546.00
5. Step 5: Solve for x
   x = 4,231,546.00/2,523.78
6. Step 6: Final answer
   x = 1,676.67