Finding the Fourth Proportional to 1,041.27, 1,436.52 and 621.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.27 : 1,436.52 = 621.53 : x
2. Step 2: Convert to fraction form
   1,041.27/1,436.52 = 621.53/x
3. Step 3: Cross multiply
   1,041.27x = 1,436.52 × 621.53
4. Step 4: Simplify right side
   1,041.27x = 892,840.28
5. Step 5: Solve for x
   x = 892,840.28/1,041.27
6. Step 6: Final answer
   x = 857.45