Finding the Fourth Proportional to 2,611.99, 3,603.63 and 1,981.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.99 : 3,603.63 = 1,981.86 : x
2. Step 2: Convert to fraction form
   2,611.99/3,603.63 = 1,981.86/x
3. Step 3: Cross multiply
   2,611.99x = 3,603.63 × 1,981.86
4. Step 4: Simplify right side
   2,611.99x = 7,141,890.15
5. Step 5: Solve for x
   x = 7,141,890.15/2,611.99
6. Step 6: Final answer
   x = 2,734.27