Finding the Fourth Proportional to 76,871.12, 106,082.32 and 42,878.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,871.12 : 106,082.32 = 42,878.76 : x
2. Step 2: Convert to fraction form
   76,871.12/106,082.32 = 42,878.76/x
3. Step 3: Cross multiply
   76,871.12x = 106,082.32 × 42,878.76
4. Step 4: Simplify right side
   76,871.12x = 4,548,678,339.52
5. Step 5: Solve for x
   x = 4,548,678,339.52/76,871.12
6. Step 6: Final answer
   x = 59,172.79