Finding the Fourth Proportional to 1,705.36, 2,353.62 and 1,006.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.36 : 2,353.62 = 1,006.72 : x
2. Step 2: Convert to fraction form
   1,705.36/2,353.62 = 1,006.72/x
3. Step 3: Cross multiply
   1,705.36x = 2,353.62 × 1,006.72
4. Step 4: Simplify right side
   1,705.36x = 2,369,436.33
5. Step 5: Solve for x
   x = 2,369,436.33/1,705.36
6. Step 6: Final answer
   x = 1,389.41