Finding the Fourth Proportional to 76,419, 105,467.94 and 42,885

Step by Step Solution

1. Step 1: Write the proportion equation
   76,419 : 105,467.94 = 42,885 : x
2. Step 2: Convert to fraction form
   76,419/105,467.94 = 42,885/x
3. Step 3: Cross multiply
   76,419x = 105,467.94 × 42,885
4. Step 4: Simplify right side
   76,419x = 4,522,992,606.90
5. Step 5: Solve for x
   x = 4,522,992,606.90/76,419
6. Step 6: Final answer
   x = 59,186.75