Finding the Fourth Proportional to 25,406.72, 38,112.16 and 6,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   25,406.72 : 38,112.16 = 6,686.72 : x
2. Step 2: Convert to fraction form
   25,406.72/38,112.16 = 6,686.72/x
3. Step 3: Cross multiply
   25,406.72x = 38,112.16 × 6,686.72
4. Step 4: Simplify right side
   25,406.72x = 254,845,342.52
5. Step 5: Solve for x
   x = 254,845,342.52/25,406.72
6. Step 6: Final answer
   x = 10,030.63