Finding the Fourth Proportional to 300,086.70, 449,976.15 and 89,697.30

Step by Step Solution

1. Step 1: Write the proportion equation
   300,086.70 : 449,976.15 = 89,697.30 : x
2. Step 2: Convert to fraction form
   300,086.70/449,976.15 = 89,697.30/x
3. Step 3: Cross multiply
   300,086.70x = 449,976.15 × 89,697.30
4. Step 4: Simplify right side
   300,086.70x = 40,361,645,719.40
5. Step 5: Solve for x
   x = 40,361,645,719.40/300,086.70
6. Step 6: Final answer
   x = 134,499.95