Finding the Fourth Proportional to 25,760.28, 35,565 and 19,780.32

Step by Step Solution

1. Step 1: Write the proportion equation
   25,760.28 : 35,565 = 19,780.32 : x
2. Step 2: Convert to fraction form
   25,760.28/35,565 = 19,780.32/x
3. Step 3: Cross multiply
   25,760.28x = 35,565 × 19,780.32
4. Step 4: Simplify right side
   25,760.28x = 703,487,080.80
5. Step 5: Solve for x
   x = 703,487,080.80/25,760.28
6. Step 6: Final answer
   x = 27,308.98