Finding the Fourth Proportional to 21,799.98, 30,084.96 and 12,847.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,799.98 : 30,084.96 = 12,847.86 : x
2. Step 2: Convert to fraction form
   21,799.98/30,084.96 = 12,847.86/x
3. Step 3: Cross multiply
   21,799.98x = 30,084.96 × 12,847.86
4. Step 4: Simplify right side
   21,799.98x = 386,527,354.19
5. Step 5: Solve for x
   x = 386,527,354.19/21,799.98
6. Step 6: Final answer
   x = 17,730.63