Finding the Fourth Proportional to 1,910.57, 2,636.57 and 1,071.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,910.57 : 2,636.57 = 1,071.32 : x
2. Step 2: Convert to fraction form
   1,910.57/2,636.57 = 1,071.32/x
3. Step 3: Cross multiply
   1,910.57x = 2,636.57 × 1,071.32
4. Step 4: Simplify right side
   1,910.57x = 2,824,610.17
5. Step 5: Solve for x
   x = 2,824,610.17/1,910.57
6. Step 6: Final answer
   x = 1,478.41