Finding the Fourth Proportional to 5,113.29, 7,055.40 and 2,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,113.29 : 7,055.40 = 2,988.72 : x
2. Step 2: Convert to fraction form
   5,113.29/7,055.40 = 2,988.72/x
3. Step 3: Cross multiply
   5,113.29x = 7,055.40 × 2,988.72
4. Step 4: Simplify right side
   5,113.29x = 21,086,615.09
5. Step 5: Solve for x
   x = 21,086,615.09/5,113.29
6. Step 6: Final answer
   x = 4,123.88