Finding the Fourth Proportional to 341.99, 471.89 and 215.89

Step by Step Solution

1. Step 1: Write the proportion equation
   341.99 : 471.89 = 215.89 : x
2. Step 2: Convert to fraction form
   341.99/471.89 = 215.89/x
3. Step 3: Cross multiply
   341.99x = 471.89 × 215.89
4. Step 4: Simplify right side
   341.99x = 101,875.69
5. Step 5: Solve for x
   x = 101,875.69/341.99
6. Step 6: Final answer
   x = 297.89