Finding the Fourth Proportional to 1,857.13, 2,561.83 and 1,071.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.13 : 2,561.83 = 1,071.02 : x
2. Step 2: Convert to fraction form
   1,857.13/2,561.83 = 1,071.02/x
3. Step 3: Cross multiply
   1,857.13x = 2,561.83 × 1,071.02
4. Step 4: Simplify right side
   1,857.13x = 2,743,774.89
5. Step 5: Solve for x
   x = 2,743,774.89/1,857.13
6. Step 6: Final answer
   x = 1,477.43