Finding the Fourth Proportional to 2,712.78, 4,068.34 and 1,152.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,712.78 : 4,068.34 = 1,152.77 : x
2. Step 2: Convert to fraction form
   2,712.78/4,068.34 = 1,152.77/x
3. Step 3: Cross multiply
   2,712.78x = 4,068.34 × 1,152.77
4. Step 4: Simplify right side
   2,712.78x = 4,689,860.30
5. Step 5: Solve for x
   x = 4,689,860.30/2,712.78
6. Step 6: Final answer
   x = 1,728.80