Finding the Fourth Proportional to 2,073.45, 2,861.63 and 1,287.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.45 : 2,861.63 = 1,287.62 : x
2. Step 2: Convert to fraction form
   2,073.45/2,861.63 = 1,287.62/x
3. Step 3: Cross multiply
   2,073.45x = 2,861.63 × 1,287.62
4. Step 4: Simplify right side
   2,073.45x = 3,684,692.02
5. Step 5: Solve for x
   x = 3,684,692.02/2,073.45
6. Step 6: Final answer
   x = 1,777.08