Finding the Fourth Proportional to 21,495.99, 29,667.20 and 12,064.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,495.99 : 29,667.20 = 12,064.55 : x
2. Step 2: Convert to fraction form
   21,495.99/29,667.20 = 12,064.55/x
3. Step 3: Cross multiply
   21,495.99x = 29,667.20 × 12,064.55
4. Step 4: Simplify right side
   21,495.99x = 357,921,209.10
5. Step 5: Solve for x
   x = 357,921,209.10/21,495.99
6. Step 6: Final answer
   x = 16,650.60