Finding the Fourth Proportional to 30,426.31, 41,928.99 and 21,912.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,426.31 : 41,928.99 = 21,912.37 : x
2. Step 2: Convert to fraction form
   30,426.31/41,928.99 = 21,912.37/x
3. Step 3: Cross multiply
   30,426.31x = 41,928.99 × 21,912.37
4. Step 4: Simplify right side
   30,426.31x = 918,763,714.72
5. Step 5: Solve for x
   x = 918,763,714.72/30,426.31
6. Step 6: Final answer
   x = 30,196.36