Finding the Fourth Proportional to 3,543.79, 4,890.59 and 1,971.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,543.79 : 4,890.59 = 1,971.98 : x
2. Step 2: Convert to fraction form
   3,543.79/4,890.59 = 1,971.98/x
3. Step 3: Cross multiply
   3,543.79x = 4,890.59 × 1,971.98
4. Step 4: Simplify right side
   3,543.79x = 9,644,155.43
5. Step 5: Solve for x
   x = 9,644,155.43/3,543.79
6. Step 6: Final answer
   x = 2,721.43