Finding the Fourth Proportional to 2,980.74, 4,471.76 and 900.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.74 : 4,471.76 = 900.57 : x
2. Step 2: Convert to fraction form
   2,980.74/4,471.76 = 900.57/x
3. Step 3: Cross multiply
   2,980.74x = 4,471.76 × 900.57
4. Step 4: Simplify right side
   2,980.74x = 4,027,128.40
5. Step 5: Solve for x
   x = 4,027,128.40/2,980.74
6. Step 6: Final answer
   x = 1,351.05