Finding the Fourth Proportional to 12,900.86, 17,806.87 and 7,598.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.86 : 17,806.87 = 7,598.73 : x
2. Step 2: Convert to fraction form
   12,900.86/17,806.87 = 7,598.73/x
3. Step 3: Cross multiply
   12,900.86x = 17,806.87 × 7,598.73
4. Step 4: Simplify right side
   12,900.86x = 135,309,597.28
5. Step 5: Solve for x
   x = 135,309,597.28/12,900.86
6. Step 6: Final answer
   x = 10,488.42