Finding the Fourth Proportional to 5,105.76, 7,046.25 and 2,980.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.76 : 7,046.25 = 2,980.53 : x
2. Step 2: Convert to fraction form
   5,105.76/7,046.25 = 2,980.53/x
3. Step 3: Cross multiply
   5,105.76x = 7,046.25 × 2,980.53
4. Step 4: Simplify right side
   5,105.76x = 21,001,559.51
5. Step 5: Solve for x
   x = 21,001,559.51/5,105.76
6. Step 6: Final answer
   x = 4,113.31