Finding the Fourth Proportional to 1,148.98, 1,713.18 and 1,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.98 : 1,713.18 = 1,128.25 : x
2. Step 2: Convert to fraction form
   1,148.98/1,713.18 = 1,128.25/x
3. Step 3: Cross multiply
   1,148.98x = 1,713.18 × 1,128.25
4. Step 4: Simplify right side
   1,148.98x = 1,932,889.69
5. Step 5: Solve for x
   x = 1,932,889.69/1,148.98
6. Step 6: Final answer
   x = 1,682.27