Finding the Fourth Proportional to 6,820.83, 9,371.96 and 5,421.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,820.83 : 9,371.96 = 5,421.15 : x
2. Step 2: Convert to fraction form
   6,820.83/9,371.96 = 5,421.15/x
3. Step 3: Cross multiply
   6,820.83x = 9,371.96 × 5,421.15
4. Step 4: Simplify right side
   6,820.83x = 50,806,773.85
5. Step 5: Solve for x
   x = 50,806,773.85/6,820.83
6. Step 6: Final answer
   x = 7,448.77