Finding the Fourth Proportional to 2,328.78, 3,492.22 and 768.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.78 : 3,492.22 = 768.72 : x
2. Step 2: Convert to fraction form
   2,328.78/3,492.22 = 768.72/x
3. Step 3: Cross multiply
   2,328.78x = 3,492.22 × 768.72
4. Step 4: Simplify right side
   2,328.78x = 2,684,539.36
5. Step 5: Solve for x
   x = 2,684,539.36/2,328.78
6. Step 6: Final answer
   x = 1,152.77