Finding the Fourth Proportional to 76,018.78, 104,911.23 and 42,028.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,018.78 : 104,911.23 = 42,028.30 : x
2. Step 2: Convert to fraction form
   76,018.78/104,911.23 = 42,028.30/x
3. Step 3: Cross multiply
   76,018.78x = 104,911.23 × 42,028.30
4. Step 4: Simplify right side
   76,018.78x = 4,409,240,647.81
5. Step 5: Solve for x
   x = 4,409,240,647.81/76,018.78
6. Step 6: Final answer
   x = 58,001.99