Finding the Fourth Proportional to 42,750, 64,131.89 and 13,167.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,750 : 64,131.89 = 13,167.82 : x
2. Step 2: Convert to fraction form
   42,750/64,131.89 = 13,167.82/x
3. Step 3: Cross multiply
   42,750x = 64,131.89 × 13,167.82
4. Step 4: Simplify right side
   42,750x = 844,477,183.78
5. Step 5: Solve for x
   x = 844,477,183.78/42,750
6. Step 6: Final answer
   x = 19,753.85