Finding the Fourth Proportional to 12,764.37, 17,615.22 and 7,729.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,764.37 : 17,615.22 = 7,729.47 : x
2. Step 2: Convert to fraction form
   12,764.37/17,615.22 = 7,729.47/x
3. Step 3: Cross multiply
   12,764.37x = 17,615.22 × 7,729.47
4. Step 4: Simplify right side
   12,764.37x = 136,156,314.53
5. Step 5: Solve for x
   x = 136,156,314.53/12,764.37
6. Step 6: Final answer
   x = 10,666.90