Finding the Fourth Proportional to 69,789.60, 103,945.39 and 69,449.76

Step by Step Solution

1. Step 1: Write the proportion equation
   69,789.60 : 103,945.39 = 69,449.76 : x
2. Step 2: Convert to fraction form
   69,789.60/103,945.39 = 69,449.76/x
3. Step 3: Cross multiply
   69,789.60x = 103,945.39 × 69,449.76
4. Step 4: Simplify right side
   69,789.60x = 7,218,982,388.61
5. Step 5: Solve for x
   x = 7,218,982,388.61/69,789.60
6. Step 6: Final answer
   x = 103,439.23