Finding the Fourth Proportional to 42,105.36, 63,134.82 and 17,139

Step by Step Solution

1. Step 1: Write the proportion equation
   42,105.36 : 63,134.82 = 17,139 : x
2. Step 2: Convert to fraction form
   42,105.36/63,134.82 = 17,139/x
3. Step 3: Cross multiply
   42,105.36x = 63,134.82 × 17,139
4. Step 4: Simplify right side
   42,105.36x = 1,082,067,679.98
5. Step 5: Solve for x
   x = 1,082,067,679.98/42,105.36
6. Step 6: Final answer
   x = 25,699.05