Finding the Fourth Proportional to 42,496.31, 63,745.82 and 12,914.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,496.31 : 63,745.82 = 12,914.40 : x
2. Step 2: Convert to fraction form
   42,496.31/63,745.82 = 12,914.40/x
3. Step 3: Cross multiply
   42,496.31x = 63,745.82 × 12,914.40
4. Step 4: Simplify right side
   42,496.31x = 823,239,240.71
5. Step 5: Solve for x
   x = 823,239,240.71/42,496.31
6. Step 6: Final answer
   x = 19,372.02