Finding the Fourth Proportional to 2,171.24, 2,992.34 and 1,580.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.24 : 2,992.34 = 1,580.74 : x
2. Step 2: Convert to fraction form
   2,171.24/2,992.34 = 1,580.74/x
3. Step 3: Cross multiply
   2,171.24x = 2,992.34 × 1,580.74
4. Step 4: Simplify right side
   2,171.24x = 4,730,111.53
5. Step 5: Solve for x
   x = 4,730,111.53/2,171.24
6. Step 6: Final answer
   x = 2,178.53