Finding the Fourth Proportional to 36,722.50, 50,681.37 and 21,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   36,722.50 : 50,681.37 = 21,818.50 : x
2. Step 2: Convert to fraction form
   36,722.50/50,681.37 = 21,818.50/x
3. Step 3: Cross multiply
   36,722.50x = 50,681.37 × 21,818.50
4. Step 4: Simplify right side
   36,722.50x = 1,105,791,471.35
5. Step 5: Solve for x
   x = 1,105,791,471.35/36,722.50
6. Step 6: Final answer
   x = 30,112.10