Finding the Fourth Proportional to 1,621.80, 2,429.82 and 1,106.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.80 : 2,429.82 = 1,106.28 : x
2. Step 2: Convert to fraction form
   1,621.80/2,429.82 = 1,106.28/x
3. Step 3: Cross multiply
   1,621.80x = 2,429.82 × 1,106.28
4. Step 4: Simplify right side
   1,621.80x = 2,688,061.27
5. Step 5: Solve for x
   x = 2,688,061.27/1,621.80
6. Step 6: Final answer
   x = 1,657.46