Finding the Fourth Proportional to 72,002.70, 107,815.05 and 50,828.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,002.70 : 107,815.05 = 50,828.40 : x
2. Step 2: Convert to fraction form
   72,002.70/107,815.05 = 50,828.40/x
3. Step 3: Cross multiply
   72,002.70x = 107,815.05 × 50,828.40
4. Step 4: Simplify right side
   72,002.70x = 5,480,066,487.42
5. Step 5: Solve for x
   x = 5,480,066,487.42/72,002.70
6. Step 6: Final answer
   x = 76,109.18