Finding the Fourth Proportional to 42,119.55, 63,123.33 and 18,391.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,119.55 : 63,123.33 = 18,391.23 : x
2. Step 2: Convert to fraction form
   42,119.55/63,123.33 = 18,391.23/x
3. Step 3: Cross multiply
   42,119.55x = 63,123.33 × 18,391.23
4. Step 4: Simplify right side
   42,119.55x = 1,160,915,680.40
5. Step 5: Solve for x
   x = 1,160,915,680.40/42,119.55
6. Step 6: Final answer
   x = 27,562.40