Finding the Fourth Proportional to 21,484.37, 29,642.34 and 13,931

Step by Step Solution

1. Step 1: Write the proportion equation
   21,484.37 : 29,642.34 = 13,931 : x
2. Step 2: Convert to fraction form
   21,484.37/29,642.34 = 13,931/x
3. Step 3: Cross multiply
   21,484.37x = 29,642.34 × 13,931
4. Step 4: Simplify right side
   21,484.37x = 412,947,438.54
5. Step 5: Solve for x
   x = 412,947,438.54/21,484.37
6. Step 6: Final answer
   x = 19,220.83