Finding the Fourth Proportional to 284,870.88, 393,105.83 and 155,783.68

Step by Step Solution

1. Step 1: Write the proportion equation
   284,870.88 : 393,105.83 = 155,783.68 : x
2. Step 2: Convert to fraction form
   284,870.88/393,105.83 = 155,783.68/x
3. Step 3: Cross multiply
   284,870.88x = 393,105.83 × 155,783.68
4. Step 4: Simplify right side
   284,870.88x = 61,239,471,065.17
5. Step 5: Solve for x
   x = 61,239,471,065.17/284,870.88
6. Step 6: Final answer
   x = 214,972.73