Finding the Fourth Proportional to 10,720.26, 16,085.86 and 5,178.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,720.26 : 16,085.86 = 5,178.33 : x
2. Step 2: Convert to fraction form
   10,720.26/16,085.86 = 5,178.33/x
3. Step 3: Cross multiply
   10,720.26x = 16,085.86 × 5,178.33
4. Step 4: Simplify right side
   10,720.26x = 83,297,878.47
5. Step 5: Solve for x
   x = 83,297,878.47/10,720.26
6. Step 6: Final answer
   x = 7,770.14