Finding the Fourth Proportional to 2,071.47, 2,858.64 and 1,127.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.47 : 2,858.64 = 1,127.28 : x
2. Step 2: Convert to fraction form
   2,071.47/2,858.64 = 1,127.28/x
3. Step 3: Cross multiply
   2,071.47x = 2,858.64 × 1,127.28
4. Step 4: Simplify right side
   2,071.47x = 3,222,487.70
5. Step 5: Solve for x
   x = 3,222,487.70/2,071.47
6. Step 6: Final answer
   x = 1,555.65