Finding the Fourth Proportional to 10,019.88, 13,826.91 and 5,543.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.88 : 13,826.91 = 5,543.55 : x
2. Step 2: Convert to fraction form
   10,019.88/13,826.91 = 5,543.55/x
3. Step 3: Cross multiply
   10,019.88x = 13,826.91 × 5,543.55
4. Step 4: Simplify right side
   10,019.88x = 76,650,166.93
5. Step 5: Solve for x
   x = 76,650,166.93/10,019.88
6. Step 6: Final answer
   x = 7,649.81