Finding the Fourth Proportional to 42,265.56, 63,404.52 and 12,685.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,265.56 : 63,404.52 = 12,685.73 : x
2. Step 2: Convert to fraction form
   42,265.56/63,404.52 = 12,685.73/x
3. Step 3: Cross multiply
   42,265.56x = 63,404.52 × 12,685.73
4. Step 4: Simplify right side
   42,265.56x = 804,332,558.07
5. Step 5: Solve for x
   x = 804,332,558.07/42,265.56
6. Step 6: Final answer
   x = 19,030.45