Finding the Fourth Proportional to 42,401.73, 63,611.84 and 12,818.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,401.73 : 63,611.84 = 12,818.81 : x
2. Step 2: Convert to fraction form
   42,401.73/63,611.84 = 12,818.81/x
3. Step 3: Cross multiply
   42,401.73x = 63,611.84 × 12,818.81
4. Step 4: Simplify right side
   42,401.73x = 815,427,708.56
5. Step 5: Solve for x
   x = 815,427,708.56/42,401.73
6. Step 6: Final answer
   x = 19,231.00