Finding the Fourth Proportional to 2,440.35, 3,657.90 and 1,054.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,440.35 : 3,657.90 = 1,054.34 : x
2. Step 2: Convert to fraction form
   2,440.35/3,657.90 = 1,054.34/x
3. Step 3: Cross multiply
   2,440.35x = 3,657.90 × 1,054.34
4. Step 4: Simplify right side
   2,440.35x = 3,856,679.43
5. Step 5: Solve for x
   x = 3,856,679.43/2,440.35
6. Step 6: Final answer
   x = 1,580.38