Finding the Fourth Proportional to 21,495.64, 29,666.88 and 12,064.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,495.64 : 29,666.88 = 12,064.72 : x
2. Step 2: Convert to fraction form
   21,495.64/29,666.88 = 12,064.72/x
3. Step 3: Cross multiply
   21,495.64x = 29,666.88 × 12,064.72
4. Step 4: Simplify right side
   21,495.64x = 357,922,600.47
5. Step 5: Solve for x
   x = 357,922,600.47/21,495.64
6. Step 6: Final answer
   x = 16,650.94