Finding the Fourth Proportional to 3,912.52, 5,868.80 and 990.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.52 : 5,868.80 = 990.83 : x
2. Step 2: Convert to fraction form
   3,912.52/5,868.80 = 990.83/x
3. Step 3: Cross multiply
   3,912.52x = 5,868.80 × 990.83
4. Step 4: Simplify right side
   3,912.52x = 5,815,002.11
5. Step 5: Solve for x
   x = 5,815,002.11/3,912.52
6. Step 6: Final answer
   x = 1,486.26