Finding the Fourth Proportional to 40,153.98, 55,438.50 and 25,820.25

Step by Step Solution

1. Step 1: Write the proportion equation
   40,153.98 : 55,438.50 = 25,820.25 : x
2. Step 2: Convert to fraction form
   40,153.98/55,438.50 = 25,820.25/x
3. Step 3: Cross multiply
   40,153.98x = 55,438.50 × 25,820.25
4. Step 4: Simplify right side
   40,153.98x = 1,431,435,929.63
5. Step 5: Solve for x
   x = 1,431,435,929.63/40,153.98
6. Step 6: Final answer
   x = 35,648.67