Finding the Fourth Proportional to 21,920.37, 30,248.28 and 12,362.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,920.37 : 30,248.28 = 12,362.61 : x
2. Step 2: Convert to fraction form
   21,920.37/30,248.28 = 12,362.61/x
3. Step 3: Cross multiply
   21,920.37x = 30,248.28 × 12,362.61
4. Step 4: Simplify right side
   21,920.37x = 373,947,688.81
5. Step 5: Solve for x
   x = 373,947,688.81/21,920.37
6. Step 6: Final answer
   x = 17,059.37