Finding the Fourth Proportional to 72,906.60, 109,100.70 and 50,615.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,906.60 : 109,100.70 = 50,615.40 : x
2. Step 2: Convert to fraction form
   72,906.60/109,100.70 = 50,615.40/x
3. Step 3: Cross multiply
   72,906.60x = 109,100.70 × 50,615.40
4. Step 4: Simplify right side
   72,906.60x = 5,522,175,570.78
5. Step 5: Solve for x
   x = 5,522,175,570.78/72,906.60
6. Step 6: Final answer
   x = 75,743.15