Finding the Fourth Proportional to 1,407.33, 1,940.40 and 1,171.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.33 : 1,940.40 = 1,171.62 : x
2. Step 2: Convert to fraction form
   1,407.33/1,940.40 = 1,171.62/x
3. Step 3: Cross multiply
   1,407.33x = 1,940.40 × 1,171.62
4. Step 4: Simplify right side
   1,407.33x = 2,273,411.45
5. Step 5: Solve for x
   x = 2,273,411.45/1,407.33
6. Step 6: Final answer
   x = 1,615.41