Finding the Fourth Proportional to 2,477.60, 3,717.76 and 1,091.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,477.60 : 3,717.76 = 1,091.92 : x
2. Step 2: Convert to fraction form
   2,477.60/3,717.76 = 1,091.92/x
3. Step 3: Cross multiply
   2,477.60x = 3,717.76 × 1,091.92
4. Step 4: Simplify right side
   2,477.60x = 4,059,496.50
5. Step 5: Solve for x
   x = 4,059,496.50/2,477.60
6. Step 6: Final answer
   x = 1,638.48