Finding the Fourth Proportional to 2,887.34, 3,980.28 and 2,045.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,887.34 : 3,980.28 = 2,045.43 : x
2. Step 2: Convert to fraction form
   2,887.34/3,980.28 = 2,045.43/x
3. Step 3: Cross multiply
   2,887.34x = 3,980.28 × 2,045.43
4. Step 4: Simplify right side
   2,887.34x = 8,141,384.12
5. Step 5: Solve for x
   x = 8,141,384.12/2,887.34
6. Step 6: Final answer
   x = 2,819.69