Finding the Fourth Proportional to 284.31, 426.59 and 137.98

Step by Step Solution

1. Step 1: Write the proportion equation
   284.31 : 426.59 = 137.98 : x
2. Step 2: Convert to fraction form
   284.31/426.59 = 137.98/x
3. Step 3: Cross multiply
   284.31x = 426.59 × 137.98
4. Step 4: Simplify right side
   284.31x = 58,860.89
5. Step 5: Solve for x
   x = 58,860.89/284.31
6. Step 6: Final answer
   x = 207.03