Finding the Fourth Proportional to 10,003.12, 13,805.13 and 5,755.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,003.12 : 13,805.13 = 5,755.57 : x
2. Step 2: Convert to fraction form
   10,003.12/13,805.13 = 5,755.57/x
3. Step 3: Cross multiply
   10,003.12x = 13,805.13 × 5,755.57
4. Step 4: Simplify right side
   10,003.12x = 79,456,392.07
5. Step 5: Solve for x
   x = 79,456,392.07/10,003.12
6. Step 6: Final answer
   x = 7,943.16