Finding the Fourth Proportional to 10,917.54, 16,381.71 and 7,447.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,917.54 : 16,381.71 = 7,447.86 : x
2. Step 2: Convert to fraction form
   10,917.54/16,381.71 = 7,447.86/x
3. Step 3: Cross multiply
   10,917.54x = 16,381.71 × 7,447.86
4. Step 4: Simplify right side
   10,917.54x = 122,008,682.64
5. Step 5: Solve for x
   x = 122,008,682.64/10,917.54
6. Step 6: Final answer
   x = 11,175.47