Finding the Fourth Proportional to 282,784.31, 390,249.89 and 153,731.42

Step by Step Solution

1. Step 1: Write the proportion equation
   282,784.31 : 390,249.89 = 153,731.42 : x
2. Step 2: Convert to fraction form
   282,784.31/390,249.89 = 153,731.42/x
3. Step 3: Cross multiply
   282,784.31x = 390,249.89 × 153,731.42
4. Step 4: Simplify right side
   282,784.31x = 59,993,671,104.50
5. Step 5: Solve for x
   x = 59,993,671,104.50/282,784.31
6. Step 6: Final answer
   x = 212,153.47