Finding the Fourth Proportional to 2,657.82, 3,988.55 and 926.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.82 : 3,988.55 = 926.45 : x
2. Step 2: Convert to fraction form
   2,657.82/3,988.55 = 926.45/x
3. Step 3: Cross multiply
   2,657.82x = 3,988.55 × 926.45
4. Step 4: Simplify right side
   2,657.82x = 3,695,192.15
5. Step 5: Solve for x
   x = 3,695,192.15/2,657.82
6. Step 6: Final answer
   x = 1,390.31