Finding the Fourth Proportional to 13,216.56, 18,239.43 and 7,910.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,216.56 : 18,239.43 = 7,910.34 : x
2. Step 2: Convert to fraction form
   13,216.56/18,239.43 = 7,910.34/x
3. Step 3: Cross multiply
   13,216.56x = 18,239.43 × 7,910.34
4. Step 4: Simplify right side
   13,216.56x = 144,280,092.71
5. Step 5: Solve for x
   x = 144,280,092.71/13,216.56
6. Step 6: Final answer
   x = 10,916.61