Finding the Fourth Proportional to 42,645.02, 63,890.91 and 25,105.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,645.02 : 63,890.91 = 25,105.28 : x
2. Step 2: Convert to fraction form
   42,645.02/63,890.91 = 25,105.28/x
3. Step 3: Cross multiply
   42,645.02x = 63,890.91 × 25,105.28
4. Step 4: Simplify right side
   42,645.02x = 1,603,998,865.55
5. Step 5: Solve for x
   x = 1,603,998,865.55/42,645.02
6. Step 6: Final answer
   x = 37,612.81