Finding the Fourth Proportional to 42,653.07, 63,992.93 and 12,667.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,653.07 : 63,992.93 = 12,667.48 : x
2. Step 2: Convert to fraction form
   42,653.07/63,992.93 = 12,667.48/x
3. Step 3: Cross multiply
   42,653.07x = 63,992.93 × 12,667.48
4. Step 4: Simplify right side
   42,653.07x = 810,629,160.92
5. Step 5: Solve for x
   x = 810,629,160.92/42,653.07
6. Step 6: Final answer
   x = 19,005.18