Finding the Fourth Proportional to 143.76, 215.82 and 143.04

Step by Step Solution

1. Step 1: Write the proportion equation
   143.76 : 215.82 = 143.04 : x
2. Step 2: Convert to fraction form
   143.76/215.82 = 143.04/x
3. Step 3: Cross multiply
   143.76x = 215.82 × 143.04
4. Step 4: Simplify right side
   143.76x = 30,870.89
5. Step 5: Solve for x
   x = 30,870.89/143.76
6. Step 6: Final answer
   x = 214.74