Finding the Fourth Proportional to 277,019.40, 382,431.32 and 196,638.96

Step by Step Solution

1. Step 1: Write the proportion equation
   277,019.40 : 382,431.32 = 196,638.96 : x
2. Step 2: Convert to fraction form
   277,019.40/382,431.32 = 196,638.96/x
3. Step 3: Cross multiply
   277,019.40x = 382,431.32 × 196,638.96
4. Step 4: Simplify right side
   277,019.40x = 75,200,897,036.23
5. Step 5: Solve for x
   x = 75,200,897,036.23/277,019.40
6. Step 6: Final answer
   x = 271,464.37