Finding the Fourth Proportional to 105,427.98, 145,550.76 and 69,721.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,427.98 : 145,550.76 = 69,721.56 : x
2. Step 2: Convert to fraction form
   105,427.98/145,550.76 = 69,721.56/x
3. Step 3: Cross multiply
   105,427.98x = 145,550.76 × 69,721.56
4. Step 4: Simplify right side
   105,427.98x = 10,148,026,046.39
5. Step 5: Solve for x
   x = 10,148,026,046.39/105,427.98
6. Step 6: Final answer
   x = 96,255.53