Finding the Fourth Proportional to 42,390.05, 63,572.85 and 17,089.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,390.05 : 63,572.85 = 17,089.56 : x
2. Step 2: Convert to fraction form
   42,390.05/63,572.85 = 17,089.56/x
3. Step 3: Cross multiply
   42,390.05x = 63,572.85 × 17,089.56
4. Step 4: Simplify right side
   42,390.05x = 1,086,432,034.45
5. Step 5: Solve for x
   x = 1,086,432,034.45/42,390.05
6. Step 6: Final answer
   x = 25,629.41