Finding the Fourth Proportional to 10,443.81, 15,663.27 and 4,891.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.81 : 15,663.27 = 4,891.86 : x
2. Step 2: Convert to fraction form
   10,443.81/15,663.27 = 4,891.86/x
3. Step 3: Cross multiply
   10,443.81x = 15,663.27 × 4,891.86
4. Step 4: Simplify right side
   10,443.81x = 76,622,523.98
5. Step 5: Solve for x
   x = 76,622,523.98/10,443.81
6. Step 6: Final answer
   x = 7,336.64