Finding the Fourth Proportional to 42,629.87, 63,942.53 and 13,047.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,629.87 : 63,942.53 = 13,047.72 : x
2. Step 2: Convert to fraction form
   42,629.87/63,942.53 = 13,047.72/x
3. Step 3: Cross multiply
   42,629.87x = 63,942.53 × 13,047.72
4. Step 4: Simplify right side
   42,629.87x = 834,304,162.29
5. Step 5: Solve for x
   x = 834,304,162.29/42,629.87
6. Step 6: Final answer
   x = 19,570.88