Finding the Fourth Proportional to 1,225.82, 1,839.45 and 576.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.82 : 1,839.45 = 576.56 : x
2. Step 2: Convert to fraction form
   1,225.82/1,839.45 = 576.56/x
3. Step 3: Cross multiply
   1,225.82x = 1,839.45 × 576.56
4. Step 4: Simplify right side
   1,225.82x = 1,060,553.29
5. Step 5: Solve for x
   x = 1,060,553.29/1,225.82
6. Step 6: Final answer
   x = 865.18