Finding the Fourth Proportional to 50,816.52, 76,219.20 and 13,380.12

Step by Step Solution

1. Step 1: Write the proportion equation
   50,816.52 : 76,219.20 = 13,380.12 : x
2. Step 2: Convert to fraction form
   50,816.52/76,219.20 = 13,380.12/x
3. Step 3: Cross multiply
   50,816.52x = 76,219.20 × 13,380.12
4. Step 4: Simplify right side
   50,816.52x = 1,019,822,042.30
5. Step 5: Solve for x
   x = 1,019,822,042.30/50,816.52
6. Step 6: Final answer
   x = 20,068.71