Finding the Fourth Proportional to 25,776.78, 35,570.27 and 15,164.37

Step by Step Solution

1. Step 1: Write the proportion equation
   25,776.78 : 35,570.27 = 15,164.37 : x
2. Step 2: Convert to fraction form
   25,776.78/35,570.27 = 15,164.37/x
3. Step 3: Cross multiply
   25,776.78x = 35,570.27 × 15,164.37
4. Step 4: Simplify right side
   25,776.78x = 539,400,659.46
5. Step 5: Solve for x
   x = 539,400,659.46/25,776.78
6. Step 6: Final answer
   x = 20,925.84