Finding the Fourth Proportional to 23,921.31, 33,012.32 and 13,310.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,921.31 : 33,012.32 = 13,310.72 : x
2. Step 2: Convert to fraction form
   23,921.31/33,012.32 = 13,310.72/x
3. Step 3: Cross multiply
   23,921.31x = 33,012.32 × 13,310.72
4. Step 4: Simplify right side
   23,921.31x = 439,417,748.07
5. Step 5: Solve for x
   x = 439,417,748.07/23,921.31
6. Step 6: Final answer
   x = 18,369.30