Finding the Fourth Proportional to 105,110.39, 145,210.31 and 68,897.79

Step by Step Solution

1. Step 1: Write the proportion equation
   105,110.39 : 145,210.31 = 68,897.79 : x
2. Step 2: Convert to fraction form
   105,110.39/145,210.31 = 68,897.79/x
3. Step 3: Cross multiply
   105,110.39x = 145,210.31 × 68,897.79
4. Step 4: Simplify right side
   105,110.39x = 10,004,669,099.73
5. Step 5: Solve for x
   x = 10,004,669,099.73/105,110.39
6. Step 6: Final answer
   x = 95,182.50