Finding the Fourth Proportional to 2,657.09, 3,985.59 and 925.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.09 : 3,985.59 = 925.67 : x
2. Step 2: Convert to fraction form
   2,657.09/3,985.59 = 925.67/x
3. Step 3: Cross multiply
   2,657.09x = 3,985.59 × 925.67
4. Step 4: Simplify right side
   2,657.09x = 3,689,353.37
5. Step 5: Solve for x
   x = 3,689,353.37/2,657.09
6. Step 6: Final answer
   x = 1,388.49