Finding the Fourth Proportional to 105,256.17, 145,204.79 and 60,518.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,256.17 : 145,204.79 = 60,518.25 : x
2. Step 2: Convert to fraction form
   105,256.17/145,204.79 = 60,518.25/x
3. Step 3: Cross multiply
   105,256.17x = 145,204.79 × 60,518.25
4. Step 4: Simplify right side
   105,256.17x = 8,787,539,479.83
5. Step 5: Solve for x
   x = 8,787,539,479.83/105,256.17
6. Step 6: Final answer
   x = 83,487.17