Finding the Fourth Proportional to 362,139.32, 499,742.69 and 200,990.22

Step by Step Solution

1. Step 1: Write the proportion equation
   362,139.32 : 499,742.69 = 200,990.22 : x
2. Step 2: Convert to fraction form
   362,139.32/499,742.69 = 200,990.22/x
3. Step 3: Cross multiply
   362,139.32x = 499,742.69 × 200,990.22
4. Step 4: Simplify right side
   362,139.32x = 100,443,392,201.54
5. Step 5: Solve for x
   x = 100,443,392,201.54/362,139.32
6. Step 6: Final answer
   x = 277,361.19