Finding the Fourth Proportional to 12,820.21, 17,692.56 and 7,516.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.21 : 17,692.56 = 7,516.73 : x
2. Step 2: Convert to fraction form
   12,820.21/17,692.56 = 7,516.73/x
3. Step 3: Cross multiply
   12,820.21x = 17,692.56 × 7,516.73
4. Step 4: Simplify right side
   12,820.21x = 132,990,196.53
5. Step 5: Solve for x
   x = 132,990,196.53/12,820.21
6. Step 6: Final answer
   x = 10,373.48