Finding the Fourth Proportional to 72,901.60, 109,093.20 and 50,610.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,901.60 : 109,093.20 = 50,610.40 : x
2. Step 2: Convert to fraction form
   72,901.60/109,093.20 = 50,610.40/x
3. Step 3: Cross multiply
   72,901.60x = 109,093.20 × 50,610.40
4. Step 4: Simplify right side
   72,901.60x = 5,521,250,489.28
5. Step 5: Solve for x
   x = 5,521,250,489.28/72,901.60
6. Step 6: Final answer
   x = 75,735.66