Finding the Fourth Proportional to 5,131.17, 7,689.33 and 2,789.19

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.17 : 7,689.33 = 2,789.19 : x
2. Step 2: Convert to fraction form
   5,131.17/7,689.33 = 2,789.19/x
3. Step 3: Cross multiply
   5,131.17x = 7,689.33 × 2,789.19
4. Step 4: Simplify right side
   5,131.17x = 21,447,002.34
5. Step 5: Solve for x
   x = 21,447,002.34/5,131.17
6. Step 6: Final answer
   x = 4,179.75