Finding the Fourth Proportional to 42,138.51, 63,208.17 and 17,173.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,138.51 : 63,208.17 = 17,173.50 : x
2. Step 2: Convert to fraction form
   42,138.51/63,208.17 = 17,173.50/x
3. Step 3: Cross multiply
   42,138.51x = 63,208.17 × 17,173.50
4. Step 4: Simplify right side
   42,138.51x = 1,085,505,507.50
5. Step 5: Solve for x
   x = 1,085,505,507.50/42,138.51
6. Step 6: Final answer
   x = 25,760.42