Finding the Fourth Proportional to 3,042.72, 4,564.10 and 990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,042.72 : 4,564.10 = 990.72 : x
2. Step 2: Convert to fraction form
   3,042.72/4,564.10 = 990.72/x
3. Step 3: Cross multiply
   3,042.72x = 4,564.10 × 990.72
4. Step 4: Simplify right side
   3,042.72x = 4,521,745.15
5. Step 5: Solve for x
   x = 4,521,745.15/3,042.72
6. Step 6: Final answer
   x = 1,486.09