Finding the Fourth Proportional to 10,007.79, 13,811.01 and 5,531.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,007.79 : 13,811.01 = 5,531.61 : x
2. Step 2: Convert to fraction form
   10,007.79/13,811.01 = 5,531.61/x
3. Step 3: Cross multiply
   10,007.79x = 13,811.01 × 5,531.61
4. Step 4: Simplify right side
   10,007.79x = 76,397,093.37
5. Step 5: Solve for x
   x = 76,397,093.37/10,007.79
6. Step 6: Final answer
   x = 7,633.77