Finding the Fourth Proportional to 42,266.94, 63,406.59 and 12,687.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,266.94 : 63,406.59 = 12,687.09 : x
2. Step 2: Convert to fraction form
   42,266.94/63,406.59 = 12,687.09/x
3. Step 3: Cross multiply
   42,266.94x = 63,406.59 × 12,687.09
4. Step 4: Simplify right side
   42,266.94x = 804,445,113.92
5. Step 5: Solve for x
   x = 804,445,113.92/42,266.94
6. Step 6: Final answer
   x = 19,032.49