Finding the Fourth Proportional to 5,003.78, 7,498.37 and 2,813.13

Step by Step Solution

1. Step 1: Write the proportion equation
   5,003.78 : 7,498.37 = 2,813.13 : x
2. Step 2: Convert to fraction form
   5,003.78/7,498.37 = 2,813.13/x
3. Step 3: Cross multiply
   5,003.78x = 7,498.37 × 2,813.13
4. Step 4: Simplify right side
   5,003.78x = 21,093,896.63
5. Step 5: Solve for x
   x = 21,093,896.63/5,003.78
6. Step 6: Final answer
   x = 4,215.60