Finding the Fourth Proportional to 21,739.82, 32,616.23 and 12,499.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,739.82 : 32,616.23 = 12,499.34 : x
2. Step 2: Convert to fraction form
   21,739.82/32,616.23 = 12,499.34/x
3. Step 3: Cross multiply
   21,739.82x = 32,616.23 × 12,499.34
4. Step 4: Simplify right side
   21,739.82x = 407,681,122.71
5. Step 5: Solve for x
   x = 407,681,122.71/21,739.82
6. Step 6: Final answer
   x = 18,752.74