Finding the Fourth Proportional to 21,912.32, 32,876.76 and 13,153.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,912.32 : 32,876.76 = 13,153.34 : x
2. Step 2: Convert to fraction form
   21,912.32/32,876.76 = 13,153.34/x
3. Step 3: Cross multiply
   21,912.32x = 32,876.76 × 13,153.34
4. Step 4: Simplify right side
   21,912.32x = 432,439,202.38
5. Step 5: Solve for x
   x = 432,439,202.38/21,912.32
6. Step 6: Final answer
   x = 19,734.98