Finding the Fourth Proportional to 10,013.31, 13,820.28 and 5,767.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,013.31 : 13,820.28 = 5,767.19 : x
2. Step 2: Convert to fraction form
   10,013.31/13,820.28 = 5,767.19/x
3. Step 3: Cross multiply
   10,013.31x = 13,820.28 × 5,767.19
4. Step 4: Simplify right side
   10,013.31x = 79,704,180.61
5. Step 5: Solve for x
   x = 79,704,180.61/10,013.31
6. Step 6: Final answer
   x = 7,959.82