Finding the Fourth Proportional to 10,020.72, 13,827.54 and 5,543.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,020.72 : 13,827.54 = 5,543.76 : x
2. Step 2: Convert to fraction form
   10,020.72/13,827.54 = 5,543.76/x
3. Step 3: Cross multiply
   10,020.72x = 13,827.54 × 5,543.76
4. Step 4: Simplify right side
   10,020.72x = 76,656,563.15
5. Step 5: Solve for x
   x = 76,656,563.15/10,020.72
6. Step 6: Final answer
   x = 7,649.81