Finding the Fourth Proportional to 13,419.72, 18,517.86 and 7,833.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.72 : 18,517.86 = 7,833.96 : x
2. Step 2: Convert to fraction form
   13,419.72/18,517.86 = 7,833.96/x
3. Step 3: Cross multiply
   13,419.72x = 18,517.86 × 7,833.96
4. Step 4: Simplify right side
   13,419.72x = 145,068,174.53
5. Step 5: Solve for x
   x = 145,068,174.53/13,419.72
6. Step 6: Final answer
   x = 10,810.07