Finding the Fourth Proportional to 13,039.45, 17,997.58 and 7,663.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,039.45 : 17,997.58 = 7,663.07 : x
2. Step 2: Convert to fraction form
   13,039.45/17,997.58 = 7,663.07/x
3. Step 3: Cross multiply
   13,039.45x = 17,997.58 × 7,663.07
4. Step 4: Simplify right side
   13,039.45x = 137,916,715.37
5. Step 5: Solve for x
   x = 137,916,715.37/13,039.45
6. Step 6: Final answer
   x = 10,576.88