Finding the Fourth Proportional to 42,112.80, 63,165.56 and 17,155.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42,112.80 : 63,165.56 = 17,155.49 : x
2. Step 2: Convert to fraction form
   42,112.80/63,165.56 = 17,155.49/x
3. Step 3: Cross multiply
   42,112.80x = 63,165.56 × 17,155.49
4. Step 4: Simplify right side
   42,112.80x = 1,083,635,731.32
5. Step 5: Solve for x
   x = 1,083,635,731.32/42,112.80
6. Step 6: Final answer
   x = 25,731.74