Finding the Fourth Proportional to 113,396.05, 169,975.41 and 42,290.10

Step by Step Solution

1. Step 1: Write the proportion equation
   113,396.05 : 169,975.41 = 42,290.10 : x
2. Step 2: Convert to fraction form
   113,396.05/169,975.41 = 42,290.10/x
3. Step 3: Cross multiply
   113,396.05x = 169,975.41 × 42,290.10
4. Step 4: Simplify right side
   113,396.05x = 7,188,277,086.44
5. Step 5: Solve for x
   x = 7,188,277,086.44/113,396.05
6. Step 6: Final answer
   x = 63,390.89