Finding the Fourth Proportional to 1,621.56, 2,233.84 and 1,123.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.56 : 2,233.84 = 1,123.32 : x
2. Step 2: Convert to fraction form
   1,621.56/2,233.84 = 1,123.32/x
3. Step 3: Cross multiply
   1,621.56x = 2,233.84 × 1,123.32
4. Step 4: Simplify right side
   1,621.56x = 2,509,317.15
5. Step 5: Solve for x
   x = 2,509,317.15/1,621.56
6. Step 6: Final answer
   x = 1,547.47