Finding the Fourth Proportional to 42,523.74, 63,799.29 and 12,947.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,523.74 : 63,799.29 = 12,947.31 : x
2. Step 2: Convert to fraction form
   42,523.74/63,799.29 = 12,947.31/x
3. Step 3: Cross multiply
   42,523.74x = 63,799.29 × 12,947.31
4. Step 4: Simplify right side
   42,523.74x = 826,029,185.41
5. Step 5: Solve for x
   x = 826,029,185.41/42,523.74
6. Step 6: Final answer
   x = 19,425.13