Finding the Fourth Proportional to 2,892.84, 3,990.69 and 1,898.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,892.84 : 3,990.69 = 1,898.43 : x
2. Step 2: Convert to fraction form
   2,892.84/3,990.69 = 1,898.43/x
3. Step 3: Cross multiply
   2,892.84x = 3,990.69 × 1,898.43
4. Step 4: Simplify right side
   2,892.84x = 7,576,045.62
5. Step 5: Solve for x
   x = 7,576,045.62/2,892.84
6. Step 6: Final answer
   x = 2,618.90