Finding the Fourth Proportional to 12,826.53, 17,700.71 and 7,521.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,826.53 : 17,700.71 = 7,521.45 : x
2. Step 2: Convert to fraction form
   12,826.53/17,700.71 = 7,521.45/x
3. Step 3: Cross multiply
   12,826.53x = 17,700.71 × 7,521.45
4. Step 4: Simplify right side
   12,826.53x = 133,134,967.62
5. Step 5: Solve for x
   x = 133,134,967.62/12,826.53
6. Step 6: Final answer
   x = 10,379.66