Finding the Fourth Proportional to 42,100.40, 63,153.70 and 12,113.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,100.40 : 63,153.70 = 12,113.42 : x
2. Step 2: Convert to fraction form
   42,100.40/63,153.70 = 12,113.42/x
3. Step 3: Cross multiply
   42,100.40x = 63,153.70 × 12,113.42
4. Step 4: Simplify right side
   42,100.40x = 765,007,292.65
5. Step 5: Solve for x
   x = 765,007,292.65/42,100.40
6. Step 6: Final answer
   x = 18,171.02