Finding the Fourth Proportional to 9,910.79, 13,676.88 and 5,434.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.79 : 13,676.88 = 5,434.61 : x
2. Step 2: Convert to fraction form
   9,910.79/13,676.88 = 5,434.61/x
3. Step 3: Cross multiply
   9,910.79x = 13,676.88 × 5,434.61
4. Step 4: Simplify right side
   9,910.79x = 74,328,508.82
5. Step 5: Solve for x
   x = 74,328,508.82/9,910.79
6. Step 6: Final answer
   x = 7,499.76