Finding the Fourth Proportional to 22,308.06, 30,786 and 12,236.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308.06 : 30,786 = 12,236.87 : x
2. Step 2: Convert to fraction form
   22,308.06/30,786 = 12,236.87/x
3. Step 3: Cross multiply
   22,308.06x = 30,786 × 12,236.87
4. Step 4: Simplify right side
   22,308.06x = 376,724,279.82
5. Step 5: Solve for x
   x = 376,724,279.82/22,308.06
6. Step 6: Final answer
   x = 16,887.36