Finding the Fourth Proportional to 22,369.31, 30,869.70 and 12,298.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,369.31 : 30,869.70 = 12,298.78 : x
2. Step 2: Convert to fraction form
   22,369.31/30,869.70 = 12,298.78/x
3. Step 3: Cross multiply
   22,369.31x = 30,869.70 × 12,298.78
4. Step 4: Simplify right side
   22,369.31x = 379,659,494.62
5. Step 5: Solve for x
   x = 379,659,494.62/22,369.31
6. Step 6: Final answer
   x = 16,972.34