Finding the Fourth Proportional to 42,156.39, 63,259.89 and 16,851.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,156.39 : 63,259.89 = 16,851.38 : x
2. Step 2: Convert to fraction form
   42,156.39/63,259.89 = 16,851.38/x
3. Step 3: Cross multiply
   42,156.39x = 63,259.89 × 16,851.38
4. Step 4: Simplify right side
   42,156.39x = 1,066,016,563.68
5. Step 5: Solve for x
   x = 1,066,016,563.68/42,156.39
6. Step 6: Final answer
   x = 25,287.19