Finding the Fourth Proportional to 21,847.82, 30,151.06 and 12,287.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,847.82 : 30,151.06 = 12,287.90 : x
2. Step 2: Convert to fraction form
   21,847.82/30,151.06 = 12,287.90/x
3. Step 3: Cross multiply
   21,847.82x = 30,151.06 × 12,287.90
4. Step 4: Simplify right side
   21,847.82x = 370,493,210.17
5. Step 5: Solve for x
   x = 370,493,210.17/21,847.82
6. Step 6: Final answer
   x = 16,957.90