Finding the Fourth Proportional to 42,001.89, 63,011.34 and 12,419.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,001.89 : 63,011.34 = 12,419.07 : x
2. Step 2: Convert to fraction form
   42,001.89/63,011.34 = 12,419.07/x
3. Step 3: Cross multiply
   42,001.89x = 63,011.34 × 12,419.07
4. Step 4: Simplify right side
   42,001.89x = 782,542,242.25
5. Step 5: Solve for x
   x = 782,542,242.25/42,001.89
6. Step 6: Final answer
   x = 18,631.12