Finding the Fourth Proportional to 76,172.94, 105,118.38 and 42,638.94

Step by Step Solution

1. Step 1: Write the proportion equation
   76,172.94 : 105,118.38 = 42,638.94 : x
2. Step 2: Convert to fraction form
   76,172.94/105,118.38 = 42,638.94/x
3. Step 3: Cross multiply
   76,172.94x = 105,118.38 × 42,638.94
4. Step 4: Simplify right side
   76,172.94x = 4,482,136,297.72
5. Step 5: Solve for x
   x = 4,482,136,297.72/76,172.94
6. Step 6: Final answer
   x = 58,841.58