Finding the Fourth Proportional to 12,345.46, 17,035.71 and 7,039.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345.46 : 17,035.71 = 7,039.30 : x
2. Step 2: Convert to fraction form
   12,345.46/17,035.71 = 7,039.30/x
3. Step 3: Cross multiply
   12,345.46x = 17,035.71 × 7,039.30
4. Step 4: Simplify right side
   12,345.46x = 119,919,473.40
5. Step 5: Solve for x
   x = 119,919,473.40/12,345.46
6. Step 6: Final answer
   x = 9,713.65