Finding the Fourth Proportional to 2,947.82, 4,423.45 and 1,100.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,947.82 : 4,423.45 = 1,100.21 : x
2. Step 2: Convert to fraction form
   2,947.82/4,423.45 = 1,100.21/x
3. Step 3: Cross multiply
   2,947.82x = 4,423.45 × 1,100.21
4. Step 4: Simplify right side
   2,947.82x = 4,866,701.81
5. Step 5: Solve for x
   x = 4,866,701.81/2,947.82
6. Step 6: Final answer
   x = 1,650.95