Finding the Fourth Proportional to 10,317.99, 14,239.17 and 5,780.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,317.99 : 14,239.17 = 5,780.86 : x
2. Step 2: Convert to fraction form
   10,317.99/14,239.17 = 5,780.86/x
3. Step 3: Cross multiply
   10,317.99x = 14,239.17 × 5,780.86
4. Step 4: Simplify right side
   10,317.99x = 82,314,619.38
5. Step 5: Solve for x
   x = 82,314,619.38/10,317.99
6. Step 6: Final answer
   x = 7,977.78