Finding the Fourth Proportional to 12,609.83, 18,907.17 and 5,209.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,609.83 : 18,907.17 = 5,209.94 : x
2. Step 2: Convert to fraction form
   12,609.83/18,907.17 = 5,209.94/x
3. Step 3: Cross multiply
   12,609.83x = 18,907.17 × 5,209.94
4. Step 4: Simplify right side
   12,609.83x = 98,505,126.73
5. Step 5: Solve for x
   x = 98,505,126.73/12,609.83
6. Step 6: Final answer
   x = 7,811.78