Finding the Fourth Proportional to 10,019.90, 13,826.21 and 5,543.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.90 : 13,826.21 = 5,543.03 : x
2. Step 2: Convert to fraction form
   10,019.90/13,826.21 = 5,543.03/x
3. Step 3: Cross multiply
   10,019.90x = 13,826.21 × 5,543.03
4. Step 4: Simplify right side
   10,019.90x = 76,638,999.97
5. Step 5: Solve for x
   x = 76,638,999.97/10,019.90
6. Step 6: Final answer
   x = 7,648.68