Finding the Fourth Proportional to 1,788.96, 2,469.96 and 1,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.96 : 2,469.96 = 1,200.72 : x
2. Step 2: Convert to fraction form
   1,788.96/2,469.96 = 1,200.72/x
3. Step 3: Cross multiply
   1,788.96x = 2,469.96 × 1,200.72
4. Step 4: Simplify right side
   1,788.96x = 2,965,730.37
5. Step 5: Solve for x
   x = 2,965,730.37/1,788.96
6. Step 6: Final answer
   x = 1,657.80