Finding the Fourth Proportional to 1,580.72, 2,179.71 and 1,084.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.72 : 2,179.71 = 1,084.08 : x
2. Step 2: Convert to fraction form
   1,580.72/2,179.71 = 1,084.08/x
3. Step 3: Cross multiply
   1,580.72x = 2,179.71 × 1,084.08
4. Step 4: Simplify right side
   1,580.72x = 2,362,988.19
5. Step 5: Solve for x
   x = 2,362,988.19/1,580.72
6. Step 6: Final answer
   x = 1,494.89