Finding the Fourth Proportional to 5,172.84, 7,139.29 and 3,047.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,172.84 : 7,139.29 = 3,047.69 : x
2. Step 2: Convert to fraction form
   5,172.84/7,139.29 = 3,047.69/x
3. Step 3: Cross multiply
   5,172.84x = 7,139.29 × 3,047.69
4. Step 4: Simplify right side
   5,172.84x = 21,758,320.73
5. Step 5: Solve for x
   x = 21,758,320.73/5,172.84
6. Step 6: Final answer
   x = 4,206.26