Finding the Fourth Proportional to 71,535.41, 107,311.76 and 18,945.89

Step by Step Solution

1. Step 1: Write the proportion equation
   71,535.41 : 107,311.76 = 18,945.89 : x
2. Step 2: Convert to fraction form
   71,535.41/107,311.76 = 18,945.89/x
3. Step 3: Cross multiply
   71,535.41x = 107,311.76 × 18,945.89
4. Step 4: Simplify right side
   71,535.41x = 2,033,116,705.94
5. Step 5: Solve for x
   x = 2,033,116,705.94/71,535.41
6. Step 6: Final answer
   x = 28,421.12