Finding the Fourth Proportional to 1,451.39, 2,177.69 and 477.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.39 : 2,177.69 = 477.56 : x
2. Step 2: Convert to fraction form
   1,451.39/2,177.69 = 477.56/x
3. Step 3: Cross multiply
   1,451.39x = 2,177.69 × 477.56
4. Step 4: Simplify right side
   1,451.39x = 1,039,980.69
5. Step 5: Solve for x
   x = 1,039,980.69/1,451.39
6. Step 6: Final answer
   x = 716.54