Finding the Fourth Proportional to 25,922.78, 35,779.28 and 15,859.61

Step by Step Solution

1. Step 1: Write the proportion equation
   25,922.78 : 35,779.28 = 15,859.61 : x
2. Step 2: Convert to fraction form
   25,922.78/35,779.28 = 15,859.61/x
3. Step 3: Cross multiply
   25,922.78x = 35,779.28 × 15,859.61
4. Step 4: Simplify right side
   25,922.78x = 567,445,168.69
5. Step 5: Solve for x
   x = 567,445,168.69/25,922.78
6. Step 6: Final answer
   x = 21,889.83