Finding the Fourth Proportional to 2,368.72, 3,553.10 and 1,215.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,368.72 : 3,553.10 = 1,215.28 : x
2. Step 2: Convert to fraction form
   2,368.72/3,553.10 = 1,215.28/x
3. Step 3: Cross multiply
   2,368.72x = 3,553.10 × 1,215.28
4. Step 4: Simplify right side
   2,368.72x = 4,318,011.37
5. Step 5: Solve for x
   x = 4,318,011.37/2,368.72
6. Step 6: Final answer
   x = 1,822.93