Finding the Fourth Proportional to 2,111.31, 2,898.03 and 1,869.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.31 : 2,898.03 = 1,869.99 : x
2. Step 2: Convert to fraction form
   2,111.31/2,898.03 = 1,869.99/x
3. Step 3: Cross multiply
   2,111.31x = 2,898.03 × 1,869.99
4. Step 4: Simplify right side
   2,111.31x = 5,419,287.12
5. Step 5: Solve for x
   x = 5,419,287.12/2,111.31
6. Step 6: Final answer
   x = 2,566.79