Finding the Fourth Proportional to 105,317.84, 145,414.71 and 65,086.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,317.84 : 145,414.71 = 65,086.76 : x
2. Step 2: Convert to fraction form
   105,317.84/145,414.71 = 65,086.76/x
3. Step 3: Cross multiply
   105,317.84x = 145,414.71 × 65,086.76
4. Step 4: Simplify right side
   105,317.84x = 9,464,571,603.17
5. Step 5: Solve for x
   x = 9,464,571,603.17/105,317.84
6. Step 6: Final answer
   x = 89,866.75