Finding the Fourth Proportional to 1,161.84, 1,740.72 and 612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,161.84 : 1,740.72 = 612.72 : x
2. Step 2: Convert to fraction form
   1,161.84/1,740.72 = 612.72/x
3. Step 3: Cross multiply
   1,161.84x = 1,740.72 × 612.72
4. Step 4: Simplify right side
   1,161.84x = 1,066,573.96
5. Step 5: Solve for x
   x = 1,066,573.96/1,161.84
6. Step 6: Final answer
   x = 918.00