Finding the Fourth Proportional to 3,605.13, 5,407.86 and 1,071.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,605.13 : 5,407.86 = 1,071.96 : x
2. Step 2: Convert to fraction form
   3,605.13/5,407.86 = 1,071.96/x
3. Step 3: Cross multiply
   3,605.13x = 5,407.86 × 1,071.96
4. Step 4: Simplify right side
   3,605.13x = 5,797,009.61
5. Step 5: Solve for x
   x = 5,797,009.61/3,605.13
6. Step 6: Final answer
   x = 1,607.99