Finding the Fourth Proportional to 105,730.76, 145,909.56 and 60,414.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,730.76 : 145,909.56 = 60,414.68 : x
2. Step 2: Convert to fraction form
   105,730.76/145,909.56 = 60,414.68/x
3. Step 3: Cross multiply
   105,730.76x = 145,909.56 × 60,414.68
4. Step 4: Simplify right side
   105,730.76x = 8,815,079,376.34
5. Step 5: Solve for x
   x = 8,815,079,376.34/105,730.76
6. Step 6: Final answer
   x = 83,372.89