Finding the Fourth Proportional to 42,402.73, 63,613.34 and 12,819.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,402.73 : 63,613.34 = 12,819.81 : x
2. Step 2: Convert to fraction form
   42,402.73/63,613.34 = 12,819.81/x
3. Step 3: Cross multiply
   42,402.73x = 63,613.34 × 12,819.81
4. Step 4: Simplify right side
   42,402.73x = 815,510,932.27
5. Step 5: Solve for x
   x = 815,510,932.27/42,402.73
6. Step 6: Final answer
   x = 19,232.51