Finding the Fourth Proportional to 1,444.50, 2,164.56 and 621.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.50 : 2,164.56 = 621.60 : x
2. Step 2: Convert to fraction form
   1,444.50/2,164.56 = 621.60/x
3. Step 3: Cross multiply
   1,444.50x = 2,164.56 × 621.60
4. Step 4: Simplify right side
   1,444.50x = 1,345,490.50
5. Step 5: Solve for x
   x = 1,345,490.50/1,444.50
6. Step 6: Final answer
   x = 931.46