Finding the Fourth Proportional to 283,142.82, 390,737.15 and 155,818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   283,142.82 : 390,737.15 = 155,818.42 : x
2. Step 2: Convert to fraction form
   283,142.82/390,737.15 = 155,818.42/x
3. Step 3: Cross multiply
   283,142.82x = 390,737.15 × 155,818.42
4. Step 4: Simplify right side
   283,142.82x = 60,884,045,348.30
5. Step 5: Solve for x
   x = 60,884,045,348.30/283,142.82
6. Step 6: Final answer
   x = 215,029.45