Finding the Fourth Proportional to 76,851.72, 115,295.40 and 30,105

Step by Step Solution

1. Step 1: Write the proportion equation
   76,851.72 : 115,295.40 = 30,105 : x
2. Step 2: Convert to fraction form
   76,851.72/115,295.40 = 30,105/x
3. Step 3: Cross multiply
   76,851.72x = 115,295.40 × 30,105
4. Step 4: Simplify right side
   76,851.72x = 3,470,968,017
5. Step 5: Solve for x
   x = 3,470,968,017/76,851.72
6. Step 6: Final answer
   x = 45,164.48