Finding the Fourth Proportional to 12,763.70, 17,611.31 and 7,457.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,763.70 : 17,611.31 = 7,457.49 : x
2. Step 2: Convert to fraction form
   12,763.70/17,611.31 = 7,457.49/x
3. Step 3: Cross multiply
   12,763.70x = 17,611.31 × 7,457.49
4. Step 4: Simplify right side
   12,763.70x = 131,336,186.86
5. Step 5: Solve for x
   x = 131,336,186.86/12,763.70
6. Step 6: Final answer
   x = 10,289.82