Finding the Fourth Proportional to 76,189.92, 105,132.16 and 42,656

Step by Step Solution

1. Step 1: Write the proportion equation
   76,189.92 : 105,132.16 = 42,656 : x
2. Step 2: Convert to fraction form
   76,189.92/105,132.16 = 42,656/x
3. Step 3: Cross multiply
   76,189.92x = 105,132.16 × 42,656
4. Step 4: Simplify right side
   76,189.92x = 4,484,517,416.96
5. Step 5: Solve for x
   x = 4,484,517,416.96/76,189.92
6. Step 6: Final answer
   x = 58,859.72