Finding the Fourth Proportional to 1,764.15, 2,640.96 and 1,068.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.15 : 2,640.96 = 1,068.72 : x
2. Step 2: Convert to fraction form
   1,764.15/2,640.96 = 1,068.72/x
3. Step 3: Cross multiply
   1,764.15x = 2,640.96 × 1,068.72
4. Step 4: Simplify right side
   1,764.15x = 2,822,446.77
5. Step 5: Solve for x
   x = 2,822,446.77/1,764.15
6. Step 6: Final answer
   x = 1,599.89