Finding the Fourth Proportional to 2,657.22, 3,986.37 and 925.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.22 : 3,986.37 = 925.98 : x
2. Step 2: Convert to fraction form
   2,657.22/3,986.37 = 925.98/x
3. Step 3: Cross multiply
   2,657.22x = 3,986.37 × 925.98
4. Step 4: Simplify right side
   2,657.22x = 3,691,298.89
5. Step 5: Solve for x
   x = 3,691,298.89/2,657.22
6. Step 6: Final answer
   x = 1,389.16