Finding the Fourth Proportional to 89,868.48, 134,818.57 and 30,690.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,868.48 : 134,818.57 = 30,690.28 : x
2. Step 2: Convert to fraction form
   89,868.48/134,818.57 = 30,690.28/x
3. Step 3: Cross multiply
   89,868.48x = 134,818.57 × 30,690.28
4. Step 4: Simplify right side
   89,868.48x = 4,137,619,662.50
5. Step 5: Solve for x
   x = 4,137,619,662.50/89,868.48
6. Step 6: Final answer
   x = 46,040.83