Finding the Fourth Proportional to 284,089.39, 392,040.89 and 155,030.42

Step by Step Solution

1. Step 1: Write the proportion equation
   284,089.39 : 392,040.89 = 155,030.42 : x
2. Step 2: Convert to fraction form
   284,089.39/392,040.89 = 155,030.42/x
3. Step 3: Cross multiply
   284,089.39x = 392,040.89 × 155,030.42
4. Step 4: Simplify right side
   284,089.39x = 60,778,263,287.00
5. Step 5: Solve for x
   x = 60,778,263,287.00/284,089.39
6. Step 6: Final answer
   x = 213,940.63