Finding the Fourth Proportional to 25,633.42, 35,376.56 and 15,559.55

Step by Step Solution

1. Step 1: Write the proportion equation
   25,633.42 : 35,376.56 = 15,559.55 : x
2. Step 2: Convert to fraction form
   25,633.42/35,376.56 = 15,559.55/x
3. Step 3: Cross multiply
   25,633.42x = 35,376.56 × 15,559.55
4. Step 4: Simplify right side
   25,633.42x = 550,443,099.47
5. Step 5: Solve for x
   x = 550,443,099.47/25,633.42
6. Step 6: Final answer
   x = 21,473.65