Finding the Fourth Proportional to 76,173.94, 105,119.76 and 42,639.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,173.94 : 105,119.76 = 42,639.94 : x
2. Step 2: Convert to fraction form
   76,173.94/105,119.76 = 42,639.94/x
3. Step 3: Cross multiply
   76,173.94x = 105,119.76 × 42,639.94
4. Step 4: Simplify right side
   76,173.94x = 4,482,300,259.21
5. Step 5: Solve for x
   x = 4,482,300,259.21/76,173.94
6. Step 6: Final answer
   x = 58,842.96