Finding the Fourth Proportional to 22,236.50, 30,686.38 and 12,804.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,236.50 : 30,686.38 = 12,804.86 : x
2. Step 2: Convert to fraction form
   22,236.50/30,686.38 = 12,804.86/x
3. Step 3: Cross multiply
   22,236.50x = 30,686.38 × 12,804.86
4. Step 4: Simplify right side
   22,236.50x = 392,934,799.81
5. Step 5: Solve for x
   x = 392,934,799.81/22,236.50
6. Step 6: Final answer
   x = 17,670.71