Finding the Fourth Proportional to 12,917.07, 17,825.67 and 7,539.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917.07 : 17,825.67 = 7,539.78 : x
2. Step 2: Convert to fraction form
   12,917.07/17,825.67 = 7,539.78/x
3. Step 3: Cross multiply
   12,917.07x = 17,825.67 × 7,539.78
4. Step 4: Simplify right side
   12,917.07x = 134,401,697.00
5. Step 5: Solve for x
   x = 134,401,697.00/12,917.07
6. Step 6: Final answer
   x = 10,404.97