Finding the Fourth Proportional to 2,652.63, 3,978.39 and 1,091.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,652.63 : 3,978.39 = 1,091.10 : x
2. Step 2: Convert to fraction form
   2,652.63/3,978.39 = 1,091.10/x
3. Step 3: Cross multiply
   2,652.63x = 3,978.39 × 1,091.10
4. Step 4: Simplify right side
   2,652.63x = 4,340,821.33
5. Step 5: Solve for x
   x = 4,340,821.33/2,652.63
6. Step 6: Final answer
   x = 1,636.42