Finding the Fourth Proportional to 2,980.59, 4,469.43 and 900.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.59 : 4,469.43 = 900.21 : x
2. Step 2: Convert to fraction form
   2,980.59/4,469.43 = 900.21/x
3. Step 3: Cross multiply
   2,980.59x = 4,469.43 × 900.21
4. Step 4: Simplify right side
   2,980.59x = 4,023,425.58
5. Step 5: Solve for x
   x = 4,023,425.58/2,980.59
6. Step 6: Final answer
   x = 1,349.88