Finding the Fourth Proportional to 13,929.37, 19,222.38 and 7,641.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,929.37 : 19,222.38 = 7,641.74 : x
2. Step 2: Convert to fraction form
   13,929.37/19,222.38 = 7,641.74/x
3. Step 3: Cross multiply
   13,929.37x = 19,222.38 × 7,641.74
4. Step 4: Simplify right side
   13,929.37x = 146,892,478.20
5. Step 5: Solve for x
   x = 146,892,478.20/13,929.37
6. Step 6: Final answer
   x = 10,545.52