Finding the Fourth Proportional to 7,281.99, 10,050.81 and 5,155.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,281.99 : 10,050.81 = 5,155.31 : x
2. Step 2: Convert to fraction form
   7,281.99/10,050.81 = 5,155.31/x
3. Step 3: Cross multiply
   7,281.99x = 10,050.81 × 5,155.31
4. Step 4: Simplify right side
   7,281.99x = 51,815,041.30
5. Step 5: Solve for x
   x = 51,815,041.30/7,281.99
6. Step 6: Final answer
   x = 7,115.51