Finding the Fourth Proportional to 2,525.72, 3,785.80 and 1,291.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,525.72 : 3,785.80 = 1,291.36 : x
2. Step 2: Convert to fraction form
   2,525.72/3,785.80 = 1,291.36/x
3. Step 3: Cross multiply
   2,525.72x = 3,785.80 × 1,291.36
4. Step 4: Simplify right side
   2,525.72x = 4,888,830.69
5. Step 5: Solve for x
   x = 4,888,830.69/2,525.72
6. Step 6: Final answer
   x = 1,935.62