Finding the Fourth Proportional to 5,407.31, 8,111.63 and 1,708.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,407.31 : 8,111.63 = 1,708.98 : x
2. Step 2: Convert to fraction form
   5,407.31/8,111.63 = 1,708.98/x
3. Step 3: Cross multiply
   5,407.31x = 8,111.63 × 1,708.98
4. Step 4: Simplify right side
   5,407.31x = 13,862,604.89
5. Step 5: Solve for x
   x = 13,862,604.89/5,407.31
6. Step 6: Final answer
   x = 2,563.68