Finding the Fourth Proportional to 10,820.01, 16,230.62 and 5,278.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,820.01 : 16,230.62 = 5,278.09 : x
2. Step 2: Convert to fraction form
   10,820.01/16,230.62 = 5,278.09/x
3. Step 3: Cross multiply
   10,820.01x = 16,230.62 × 5,278.09
4. Step 4: Simplify right side
   10,820.01x = 85,666,673.12
5. Step 5: Solve for x
   x = 85,666,673.12/10,820.01
6. Step 6: Final answer
   x = 7,917.43