Finding the Fourth Proportional to 42,629, 63,969.42 and 18,005

Step by Step Solution

1. Step 1: Write the proportion equation
   42,629 : 63,969.42 = 18,005 : x
2. Step 2: Convert to fraction form
   42,629/63,969.42 = 18,005/x
3. Step 3: Cross multiply
   42,629x = 63,969.42 × 18,005
4. Step 4: Simplify right side
   42,629x = 1,151,769,407.10
5. Step 5: Solve for x
   x = 1,151,769,407.10/42,629
6. Step 6: Final answer
   x = 27,018.45