Finding the Fourth Proportional to 12,704.67, 17,533.80 and 7,039.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,704.67 : 17,533.80 = 7,039.89 : x
2. Step 2: Convert to fraction form
   12,704.67/17,533.80 = 7,039.89/x
3. Step 3: Cross multiply
   12,704.67x = 17,533.80 × 7,039.89
4. Step 4: Simplify right side
   12,704.67x = 123,436,023.28
5. Step 5: Solve for x
   x = 123,436,023.28/12,704.67
6. Step 6: Final answer
   x = 9,715.80