Finding the Fourth Proportional to 42,300, 63,451.02 and 14,220.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,300 : 63,451.02 = 14,220.42 : x
2. Step 2: Convert to fraction form
   42,300/63,451.02 = 14,220.42/x
3. Step 3: Cross multiply
   42,300x = 63,451.02 × 14,220.42
4. Step 4: Simplify right side
   42,300x = 902,300,153.83
5. Step 5: Solve for x
   x = 902,300,153.83/42,300
6. Step 6: Final answer
   x = 21,330.97