Finding the Fourth Proportional to 91,480.56, 137,190.06 and 30,678.54

Step by Step Solution

1. Step 1: Write the proportion equation
   91,480.56 : 137,190.06 = 30,678.54 : x
2. Step 2: Convert to fraction form
   91,480.56/137,190.06 = 30,678.54/x
3. Step 3: Cross multiply
   91,480.56x = 137,190.06 × 30,678.54
4. Step 4: Simplify right side
   91,480.56x = 4,208,790,743.31
5. Step 5: Solve for x
   x = 4,208,790,743.31/91,480.56
6. Step 6: Final answer
   x = 46,007.49