Finding the Fourth Proportional to 76,419.25, 105,468.29 and 42,885.25

Step by Step Solution

1. Step 1: Write the proportion equation
   76,419.25 : 105,468.29 = 42,885.25 : x
2. Step 2: Convert to fraction form
   76,419.25/105,468.29 = 42,885.25/x
3. Step 3: Cross multiply
   76,419.25x = 105,468.29 × 42,885.25
4. Step 4: Simplify right side
   76,419.25x = 4,523,033,769.30
5. Step 5: Solve for x
   x = 4,523,033,769.30/76,419.25
6. Step 6: Final answer
   x = 59,187.10