Finding the Fourth Proportional to 1,621.71, 2,235.91 and 1,061.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.71 : 2,235.91 = 1,061.29 : x
2. Step 2: Convert to fraction form
   1,621.71/2,235.91 = 1,061.29/x
3. Step 3: Cross multiply
   1,621.71x = 2,235.91 × 1,061.29
4. Step 4: Simplify right side
   1,621.71x = 2,372,948.92
5. Step 5: Solve for x
   x = 2,372,948.92/1,621.71
6. Step 6: Final answer
   x = 1,463.24