Finding the Fourth Proportional to 2,647.35, 3,972.38 and 1,088.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.35 : 3,972.38 = 1,088.55 : x
2. Step 2: Convert to fraction form
   2,647.35/3,972.38 = 1,088.55/x
3. Step 3: Cross multiply
   2,647.35x = 3,972.38 × 1,088.55
4. Step 4: Simplify right side
   2,647.35x = 4,324,128.81
5. Step 5: Solve for x
   x = 4,324,128.81/2,647.35
6. Step 6: Final answer
   x = 1,633.38