Finding the Fourth Proportional to 1,678.79, 2,501.31 and 1,584.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.79 : 2,501.31 = 1,584.47 : x
2. Step 2: Convert to fraction form
   1,678.79/2,501.31 = 1,584.47/x
3. Step 3: Cross multiply
   1,678.79x = 2,501.31 × 1,584.47
4. Step 4: Simplify right side
   1,678.79x = 3,963,241.59
5. Step 5: Solve for x
   x = 3,963,241.59/1,678.79
6. Step 6: Final answer
   x = 2,360.78