Finding the Fourth Proportional to 201,856.73, 302,787.41 and 86,435.69

Step by Step Solution

1. Step 1: Write the proportion equation
   201,856.73 : 302,787.41 = 86,435.69 : x
2. Step 2: Convert to fraction form
   201,856.73/302,787.41 = 86,435.69/x
3. Step 3: Cross multiply
   201,856.73x = 302,787.41 × 86,435.69
4. Step 4: Simplify right side
   201,856.73x = 26,171,636,760.55
5. Step 5: Solve for x
   x = 26,171,636,760.55/201,856.73
6. Step 6: Final answer
   x = 129,654.52