Finding the Fourth Proportional to 2,095.20, 3,139.20 and 1,106.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,095.20 : 3,139.20 = 1,106.55 : x
2. Step 2: Convert to fraction form
   2,095.20/3,139.20 = 1,106.55/x
3. Step 3: Cross multiply
   2,095.20x = 3,139.20 × 1,106.55
4. Step 4: Simplify right side
   2,095.20x = 3,473,681.76
5. Step 5: Solve for x
   x = 3,473,681.76/2,095.20
6. Step 6: Final answer
   x = 1,657.92