Finding the Fourth Proportional to 42,402.48, 63,612.96 and 12,819.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,402.48 : 63,612.96 = 12,819.56 : x
2. Step 2: Convert to fraction form
   42,402.48/63,612.96 = 12,819.56/x
3. Step 3: Cross multiply
   42,402.48x = 63,612.96 × 12,819.56
4. Step 4: Simplify right side
   42,402.48x = 815,489,839.43
5. Step 5: Solve for x
   x = 815,489,839.43/42,402.48
6. Step 6: Final answer
   x = 19,232.13