Finding the Fourth Proportional to 42,397.12, 63,598.02 and 12,814.21

Step by Step Solution

1. Step 1: Write the proportion equation
   42,397.12 : 63,598.02 = 12,814.21 : x
2. Step 2: Convert to fraction form
   42,397.12/63,598.02 = 12,814.21/x
3. Step 3: Cross multiply
   42,397.12x = 63,598.02 × 12,814.21
4. Step 4: Simplify right side
   42,397.12x = 814,958,383.86
5. Step 5: Solve for x
   x = 814,958,383.86/42,397.12
6. Step 6: Final answer
   x = 19,222.02