Finding the Fourth Proportional to 21,864.15, 30,152.72 and 14,308.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,864.15 : 30,152.72 = 14,308.07 : x
2. Step 2: Convert to fraction form
   21,864.15/30,152.72 = 14,308.07/x
3. Step 3: Cross multiply
   21,864.15x = 30,152.72 × 14,308.07
4. Step 4: Simplify right side
   21,864.15x = 431,427,113.46
5. Step 5: Solve for x
   x = 431,427,113.46/21,864.15
6. Step 6: Final answer
   x = 19,732.17