Finding the Fourth Proportional to 42,428.78, 63,590.90 and 17,453.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,428.78 : 63,590.90 = 17,453.24 : x
2. Step 2: Convert to fraction form
   42,428.78/63,590.90 = 17,453.24/x
3. Step 3: Cross multiply
   42,428.78x = 63,590.90 × 17,453.24
4. Step 4: Simplify right side
   42,428.78x = 1,109,867,239.52
5. Step 5: Solve for x
   x = 1,109,867,239.52/42,428.78
6. Step 6: Final answer
   x = 26,158.36