Finding the Fourth Proportional to 42,274.14, 63,392.53 and 12,686.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,274.14 : 63,392.53 = 12,686.31 : x
2. Step 2: Convert to fraction form
   42,274.14/63,392.53 = 12,686.31/x
3. Step 3: Cross multiply
   42,274.14x = 63,392.53 × 12,686.31
4. Step 4: Simplify right side
   42,274.14x = 804,217,223.83
5. Step 5: Solve for x
   x = 804,217,223.83/42,274.14
6. Step 6: Final answer
   x = 19,023.86