Finding the Fourth Proportional to 2,921.82, 4,382.70 and 1,118.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,921.82 : 4,382.70 = 1,118.91 : x
2. Step 2: Convert to fraction form
   2,921.82/4,382.70 = 1,118.91/x
3. Step 3: Cross multiply
   2,921.82x = 4,382.70 × 1,118.91
4. Step 4: Simplify right side
   2,921.82x = 4,903,846.86
5. Step 5: Solve for x
   x = 4,903,846.86/2,921.82
6. Step 6: Final answer
   x = 1,678.35