Finding the Fourth Proportional to 37,698.06, 56,553.27 and 12,739.62

Step by Step Solution

1. Step 1: Write the proportion equation
   37,698.06 : 56,553.27 = 12,739.62 : x
2. Step 2: Convert to fraction form
   37,698.06/56,553.27 = 12,739.62/x
3. Step 3: Cross multiply
   37,698.06x = 56,553.27 × 12,739.62
4. Step 4: Simplify right side
   37,698.06x = 720,467,169.56
5. Step 5: Solve for x
   x = 720,467,169.56/37,698.06
6. Step 6: Final answer
   x = 19,111.52