Finding the Fourth Proportional to 25,209.72, 37,820.07 and 7,679.09

Step by Step Solution

1. Step 1: Write the proportion equation
   25,209.72 : 37,820.07 = 7,679.09 : x
2. Step 2: Convert to fraction form
   25,209.72/37,820.07 = 7,679.09/x
3. Step 3: Cross multiply
   25,209.72x = 37,820.07 × 7,679.09
4. Step 4: Simplify right side
   25,209.72x = 290,423,815.89
5. Step 5: Solve for x
   x = 290,423,815.89/25,209.72
6. Step 6: Final answer
   x = 11,520.31