Finding the Fourth Proportional to 428,634.76, 642,902.83 and 113,116.27

Step by Step Solution

1. Step 1: Write the proportion equation
   428,634.76 : 642,902.83 = 113,116.27 : x
2. Step 2: Convert to fraction form
   428,634.76/642,902.83 = 113,116.27/x
3. Step 3: Cross multiply
   428,634.76x = 642,902.83 × 113,116.27
4. Step 4: Simplify right side
   428,634.76x = 72,722,770,102.04
5. Step 5: Solve for x
   x = 72,722,770,102.04/428,634.76
6. Step 6: Final answer
   x = 169,661.39