Finding the Fourth Proportional to 1,141.72, 1,712.17 and 556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.72 : 1,712.17 = 556.72 : x
2. Step 2: Convert to fraction form
   1,141.72/1,712.17 = 556.72/x
3. Step 3: Cross multiply
   1,141.72x = 1,712.17 × 556.72
4. Step 4: Simplify right side
   1,141.72x = 953,199.28
5. Step 5: Solve for x
   x = 953,199.28/1,141.72
6. Step 6: Final answer
   x = 834.88