Finding the Fourth Proportional to 1,861.56, 2,564.82 and 1,271.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.56 : 2,564.82 = 1,271.07 : x
2. Step 2: Convert to fraction form
   1,861.56/2,564.82 = 1,271.07/x
3. Step 3: Cross multiply
   1,861.56x = 2,564.82 × 1,271.07
4. Step 4: Simplify right side
   1,861.56x = 3,260,065.76
5. Step 5: Solve for x
   x = 3,260,065.76/1,861.56
6. Step 6: Final answer
   x = 1,751.25