Finding the Fourth Proportional to 12,826.42, 17,700.32 and 7,520.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,826.42 : 17,700.32 = 7,520.21 : x
2. Step 2: Convert to fraction form
   12,826.42/17,700.32 = 7,520.21/x
3. Step 3: Cross multiply
   12,826.42x = 17,700.32 × 7,520.21
4. Step 4: Simplify right side
   12,826.42x = 133,110,120.14
5. Step 5: Solve for x
   x = 133,110,120.14/12,826.42
6. Step 6: Final answer
   x = 10,377.81