Finding the Fourth Proportional to 21,362.84, 29,478.18 and 12,864.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,362.84 : 29,478.18 = 12,864.83 : x
2. Step 2: Convert to fraction form
   21,362.84/29,478.18 = 12,864.83/x
3. Step 3: Cross multiply
   21,362.84x = 29,478.18 × 12,864.83
4. Step 4: Simplify right side
   21,362.84x = 379,231,602.90
5. Step 5: Solve for x
   x = 379,231,602.90/21,362.84
6. Step 6: Final answer
   x = 17,751.93