Finding the Fourth Proportional to 1,677.71, 2,516.31 and 1,059.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.71 : 2,516.31 = 1,059.54 : x
2. Step 2: Convert to fraction form
   1,677.71/2,516.31 = 1,059.54/x
3. Step 3: Cross multiply
   1,677.71x = 2,516.31 × 1,059.54
4. Step 4: Simplify right side
   1,677.71x = 2,666,131.10
5. Step 5: Solve for x
   x = 2,666,131.10/1,677.71
6. Step 6: Final answer
   x = 1,589.15