Finding the Fourth Proportional to 21,973.02, 30,315.24 and 12,411.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,973.02 : 30,315.24 = 12,411.78 : x
2. Step 2: Convert to fraction form
   21,973.02/30,315.24 = 12,411.78/x
3. Step 3: Cross multiply
   21,973.02x = 30,315.24 × 12,411.78
4. Step 4: Simplify right side
   21,973.02x = 376,266,089.53
5. Step 5: Solve for x
   x = 376,266,089.53/21,973.02
6. Step 6: Final answer
   x = 17,124.00