Finding the Fourth Proportional to 42,673.08, 64,007.82 and 13,089.36

Step by Step Solution

1. Step 1: Write the proportion equation
   42,673.08 : 64,007.82 = 13,089.36 : x
2. Step 2: Convert to fraction form
   42,673.08/64,007.82 = 13,089.36/x
3. Step 3: Cross multiply
   42,673.08x = 64,007.82 × 13,089.36
4. Step 4: Simplify right side
   42,673.08x = 837,821,398.80
5. Step 5: Solve for x
   x = 837,821,398.80/42,673.08
6. Step 6: Final answer
   x = 19,633.49