Finding the Fourth Proportional to 2,980.63, 4,470.72 and 900.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.63 : 4,470.72 = 900.58 : x
2. Step 2: Convert to fraction form
   2,980.63/4,470.72 = 900.58/x
3. Step 3: Cross multiply
   2,980.63x = 4,470.72 × 900.58
4. Step 4: Simplify right side
   2,980.63x = 4,026,241.02
5. Step 5: Solve for x
   x = 4,026,241.02/2,980.63
6. Step 6: Final answer
   x = 1,350.80