Finding the Fourth Proportional to 35,640.72, 53,479.68 and 25,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,640.72 : 53,479.68 = 25,860.72 : x
2. Step 2: Convert to fraction form
   35,640.72/53,479.68 = 25,860.72/x
3. Step 3: Cross multiply
   35,640.72x = 53,479.68 × 25,860.72
4. Step 4: Simplify right side
   35,640.72x = 1,383,023,030.17
5. Step 5: Solve for x
   x = 1,383,023,030.17/35,640.72
6. Step 6: Final answer
   x = 38,804.58