Finding the Fourth Proportional to 7,830.28, 10,803.54 and 5,176.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,830.28 : 10,803.54 = 5,176.72 : x
2. Step 2: Convert to fraction form
   7,830.28/10,803.54 = 5,176.72/x
3. Step 3: Cross multiply
   7,830.28x = 10,803.54 × 5,176.72
4. Step 4: Simplify right side
   7,830.28x = 55,926,901.59
5. Step 5: Solve for x
   x = 55,926,901.59/7,830.28
6. Step 6: Final answer
   x = 7,142.39