Finding the Fourth Proportional to 2,990.50, 4,481.71 and 1,140.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,990.50 : 4,481.71 = 1,140.61 : x
2. Step 2: Convert to fraction form
   2,990.50/4,481.71 = 1,140.61/x
3. Step 3: Cross multiply
   2,990.50x = 4,481.71 × 1,140.61
4. Step 4: Simplify right side
   2,990.50x = 5,111,883.24
5. Step 5: Solve for x
   x = 5,111,883.24/2,990.50
6. Step 6: Final answer
   x = 1,709.37