Finding the Fourth Proportional to 13,123.23, 18,096.32 and 8,641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,123.23 : 18,096.32 = 8,641.25 : x
2. Step 2: Convert to fraction form
   13,123.23/18,096.32 = 8,641.25/x
3. Step 3: Cross multiply
   13,123.23x = 18,096.32 × 8,641.25
4. Step 4: Simplify right side
   13,123.23x = 156,374,691.51
5. Step 5: Solve for x
   x = 156,374,691.51/13,123.23
6. Step 6: Final answer
   x = 11,915.87