Finding the Fourth Proportional to 2,803.61, 3,869.47 and 2,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,803.61 : 3,869.47 = 2,061.40 : x
2. Step 2: Convert to fraction form
   2,803.61/3,869.47 = 2,061.40/x
3. Step 3: Cross multiply
   2,803.61x = 3,869.47 × 2,061.40
4. Step 4: Simplify right side
   2,803.61x = 7,976,525.62
5. Step 5: Solve for x
   x = 7,976,525.62/2,803.61
6. Step 6: Final answer
   x = 2,845.09