Finding the Fourth Proportional to 12,809.72, 17,670.30 and 7,503.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.72 : 17,670.30 = 7,503.50 : x
2. Step 2: Convert to fraction form
   12,809.72/17,670.30 = 7,503.50/x
3. Step 3: Cross multiply
   12,809.72x = 17,670.30 × 7,503.50
4. Step 4: Simplify right side
   12,809.72x = 132,589,096.05
5. Step 5: Solve for x
   x = 132,589,096.05/12,809.72
6. Step 6: Final answer
   x = 10,350.66