Finding the Fourth Proportional to 21,803.76, 30,084.54 and 12,848.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,803.76 : 30,084.54 = 12,848.04 : x
2. Step 2: Convert to fraction form
   21,803.76/30,084.54 = 12,848.04/x
3. Step 3: Cross multiply
   21,803.76x = 30,084.54 × 12,848.04
4. Step 4: Simplify right side
   21,803.76x = 386,527,373.30
5. Step 5: Solve for x
   x = 386,527,373.30/21,803.76
6. Step 6: Final answer
   x = 17,727.56