Finding the Fourth Proportional to 271,805.30, 406,901.55 and 201,994.10

Step by Step Solution

1. Step 1: Write the proportion equation
   271,805.30 : 406,901.55 = 201,994.10 : x
2. Step 2: Convert to fraction form
   271,805.30/406,901.55 = 201,994.10/x
3. Step 3: Cross multiply
   271,805.30x = 406,901.55 × 201,994.10
4. Step 4: Simplify right side
   271,805.30x = 82,191,712,380.86
5. Step 5: Solve for x
   x = 82,191,712,380.86/271,805.30
6. Step 6: Final answer
   x = 302,391.87