Finding the Fourth Proportional to 1,061.10, 1,589.63 and 621.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.10 : 1,589.63 = 621.27 : x
2. Step 2: Convert to fraction form
   1,061.10/1,589.63 = 621.27/x
3. Step 3: Cross multiply
   1,061.10x = 1,589.63 × 621.27
4. Step 4: Simplify right side
   1,061.10x = 987,586.32
5. Step 5: Solve for x
   x = 987,586.32/1,061.10
6. Step 6: Final answer
   x = 930.72