Finding the Fourth Proportional to 2,748.78, 4,122.72 and 993.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.78 : 4,122.72 = 993.42 : x
2. Step 2: Convert to fraction form
   2,748.78/4,122.72 = 993.42/x
3. Step 3: Cross multiply
   2,748.78x = 4,122.72 × 993.42
4. Step 4: Simplify right side
   2,748.78x = 4,095,592.50
5. Step 5: Solve for x
   x = 4,095,592.50/2,748.78
6. Step 6: Final answer
   x = 1,489.97