Finding the Fourth Proportional to 25,320.94, 37,978.08 and 7,789.30

Step by Step Solution

1. Step 1: Write the proportion equation
   25,320.94 : 37,978.08 = 7,789.30 : x
2. Step 2: Convert to fraction form
   25,320.94/37,978.08 = 7,789.30/x
3. Step 3: Cross multiply
   25,320.94x = 37,978.08 × 7,789.30
4. Step 4: Simplify right side
   25,320.94x = 295,822,658.54
5. Step 5: Solve for x
   x = 295,822,658.54/25,320.94
6. Step 6: Final answer
   x = 11,682.93