Finding the Fourth Proportional to 105,643.76, 145,752.18 and 60,289

Step by Step Solution

1. Step 1: Write the proportion equation
   105,643.76 : 145,752.18 = 60,289 : x
2. Step 2: Convert to fraction form
   105,643.76/145,752.18 = 60,289/x
3. Step 3: Cross multiply
   105,643.76x = 145,752.18 × 60,289
4. Step 4: Simplify right side
   105,643.76x = 8,787,253,180.02
5. Step 5: Solve for x
   x = 8,787,253,180.02/105,643.76
6. Step 6: Final answer
   x = 83,178.16