Finding the Fourth Proportional to 2,165.17, 2,978.49 and 1,898.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.17 : 2,978.49 = 1,898.41 : x
2. Step 2: Convert to fraction form
   2,165.17/2,978.49 = 1,898.41/x
3. Step 3: Cross multiply
   2,165.17x = 2,978.49 × 1,898.41
4. Step 4: Simplify right side
   2,165.17x = 5,654,395.20
5. Step 5: Solve for x
   x = 5,654,395.20/2,165.17
6. Step 6: Final answer
   x = 2,611.52