Finding the Fourth Proportional to 1,405.71, 2,106.60 and 1,096.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.71 : 2,106.60 = 1,096.17 : x
2. Step 2: Convert to fraction form
   1,405.71/2,106.60 = 1,096.17/x
3. Step 3: Cross multiply
   1,405.71x = 2,106.60 × 1,096.17
4. Step 4: Simplify right side
   1,405.71x = 2,309,191.72
5. Step 5: Solve for x
   x = 2,309,191.72/1,405.71
6. Step 6: Final answer
   x = 1,642.72