Finding the Fourth Proportional to 78,231.56, 117,386.82 and 30,880.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,231.56 : 117,386.82 = 30,880.58 : x
2. Step 2: Convert to fraction form
   78,231.56/117,386.82 = 30,880.58/x
3. Step 3: Cross multiply
   78,231.56x = 117,386.82 × 30,880.58
4. Step 4: Simplify right side
   78,231.56x = 3,624,972,499.02
5. Step 5: Solve for x
   x = 3,624,972,499.02/78,231.56
6. Step 6: Final answer
   x = 46,336.45