Finding the Fourth Proportional to 1,124.82, 1,690.38 and 1,118.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.82 : 1,690.38 = 1,118.88 : x
2. Step 2: Convert to fraction form
   1,124.82/1,690.38 = 1,118.88/x
3. Step 3: Cross multiply
   1,124.82x = 1,690.38 × 1,118.88
4. Step 4: Simplify right side
   1,124.82x = 1,891,332.37
5. Step 5: Solve for x
   x = 1,891,332.37/1,124.82
6. Step 6: Final answer
   x = 1,681.45