Finding the Fourth Proportional to 2,657.72, 3,986.60 and 926.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.72 : 3,986.60 = 926.34 : x
2. Step 2: Convert to fraction form
   2,657.72/3,986.60 = 926.34/x
3. Step 3: Cross multiply
   2,657.72x = 3,986.60 × 926.34
4. Step 4: Simplify right side
   2,657.72x = 3,692,947.04
5. Step 5: Solve for x
   x = 3,692,947.04/2,657.72
6. Step 6: Final answer
   x = 1,389.52