Finding the Fourth Proportional to 42,003.14, 63,017.00 and 12,421.73

Step by Step Solution

1. Step 1: Write the proportion equation
   42,003.14 : 63,017.00 = 12,421.73 : x
2. Step 2: Convert to fraction form
   42,003.14/63,017.00 = 12,421.73/x
3. Step 3: Cross multiply
   42,003.14x = 63,017.00 × 12,421.73
4. Step 4: Simplify right side
   42,003.14x = 782,779,782.22
5. Step 5: Solve for x
   x = 782,779,782.22/42,003.14
6. Step 6: Final answer
   x = 18,636.22