Finding the Fourth Proportional to 2,505.71, 3,456.72 and 1,621.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.71 : 3,456.72 = 1,621.79 : x
2. Step 2: Convert to fraction form
   2,505.71/3,456.72 = 1,621.79/x
3. Step 3: Cross multiply
   2,505.71x = 3,456.72 × 1,621.79
4. Step 4: Simplify right side
   2,505.71x = 5,606,056.65
5. Step 5: Solve for x
   x = 5,606,056.65/2,505.71
6. Step 6: Final answer
   x = 2,237.32