Finding the Fourth Proportional to 1,693.40, 2,336.20 and 1,103.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,693.40 : 2,336.20 = 1,103.72 : x
2. Step 2: Convert to fraction form
   1,693.40/2,336.20 = 1,103.72/x
3. Step 3: Cross multiply
   1,693.40x = 2,336.20 × 1,103.72
4. Step 4: Simplify right side
   1,693.40x = 2,578,510.66
5. Step 5: Solve for x
   x = 2,578,510.66/1,693.40
6. Step 6: Final answer
   x = 1,522.68