Finding the Fourth Proportional to 21,667.52, 32,474.70 and 12,315.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.52 : 32,474.70 = 12,315.38 : x
2. Step 2: Convert to fraction form
   21,667.52/32,474.70 = 12,315.38/x
3. Step 3: Cross multiply
   21,667.52x = 32,474.70 × 12,315.38
4. Step 4: Simplify right side
   21,667.52x = 399,938,108.51
5. Step 5: Solve for x
   x = 399,938,108.51/21,667.52
6. Step 6: Final answer
   x = 18,457.95