Finding the Fourth Proportional to 21,997.02, 30,355.52 and 12,436.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,997.02 : 30,355.52 = 12,436.75 : x
2. Step 2: Convert to fraction form
   21,997.02/30,355.52 = 12,436.75/x
3. Step 3: Cross multiply
   21,997.02x = 30,355.52 × 12,436.75
4. Step 4: Simplify right side
   21,997.02x = 377,523,875.29
5. Step 5: Solve for x
   x = 377,523,875.29/21,997.02
6. Step 6: Final answer
   x = 17,162.50