Finding the Fourth Proportional to 76,456.09, 105,505.81 and 42,466.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,456.09 : 105,505.81 = 42,466.78 : x
2. Step 2: Convert to fraction form
   76,456.09/105,505.81 = 42,466.78/x
3. Step 3: Cross multiply
   76,456.09x = 105,505.81 × 42,466.78
4. Step 4: Simplify right side
   76,456.09x = 4,480,492,021.99
5. Step 5: Solve for x
   x = 4,480,492,021.99/76,456.09
6. Step 6: Final answer
   x = 58,602.16