Finding the Fourth Proportional to 21,942.12, 30,280.50 and 12,510.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,942.12 : 30,280.50 = 12,510.84 : x
2. Step 2: Convert to fraction form
   21,942.12/30,280.50 = 12,510.84/x
3. Step 3: Cross multiply
   21,942.12x = 30,280.50 × 12,510.84
4. Step 4: Simplify right side
   21,942.12x = 378,834,490.62
5. Step 5: Solve for x
   x = 378,834,490.62/21,942.12
6. Step 6: Final answer
   x = 17,265.17