Finding the Fourth Proportional to 300,020.76, 449,856.18 and 89,602.20

Step by Step Solution

1. Step 1: Write the proportion equation
   300,020.76 : 449,856.18 = 89,602.20 : x
2. Step 2: Convert to fraction form
   300,020.76/449,856.18 = 89,602.20/x
3. Step 3: Cross multiply
   300,020.76x = 449,856.18 × 89,602.20
4. Step 4: Simplify right side
   300,020.76x = 40,308,103,411.60
5. Step 5: Solve for x
   x = 40,308,103,411.60/300,020.76
6. Step 6: Final answer
   x = 134,351.05