Finding the Fourth Proportional to 9,820.13, 14,738.67 and 5,143.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,820.13 : 14,738.67 = 5,143.39 : x
2. Step 2: Convert to fraction form
   9,820.13/14,738.67 = 5,143.39/x
3. Step 3: Cross multiply
   9,820.13x = 14,738.67 × 5,143.39
4. Step 4: Simplify right side
   9,820.13x = 75,806,691.04
5. Step 5: Solve for x
   x = 75,806,691.04/9,820.13
6. Step 6: Final answer
   x = 7,719.52