Finding the Fourth Proportional to 21,493.86, 29,667.72 and 12,995.99

Step by Step Solution

1. Step 1: Write the proportion equation
   21,493.86 : 29,667.72 = 12,995.99 : x
2. Step 2: Convert to fraction form
   21,493.86/29,667.72 = 12,995.99/x
3. Step 3: Cross multiply
   21,493.86x = 29,667.72 × 12,995.99
4. Step 4: Simplify right side
   21,493.86x = 385,561,497.87
5. Step 5: Solve for x
   x = 385,561,497.87/21,493.86
6. Step 6: Final answer
   x = 17,938.22