Finding the Fourth Proportional to 42,103.68, 63,180 and 17,139.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,103.68 : 63,180 = 17,139.84 : x
2. Step 2: Convert to fraction form
   42,103.68/63,180 = 17,139.84/x
3. Step 3: Cross multiply
   42,103.68x = 63,180 × 17,139.84
4. Step 4: Simplify right side
   42,103.68x = 1,082,895,091.20
5. Step 5: Solve for x
   x = 1,082,895,091.20/42,103.68
6. Step 6: Final answer
   x = 25,719.73