Finding the Fourth Proportional to 1,231.47, 1,841.69 and 1,116.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231.47 : 1,841.69 = 1,116.63 : x
2. Step 2: Convert to fraction form
   1,231.47/1,841.69 = 1,116.63/x
3. Step 3: Cross multiply
   1,231.47x = 1,841.69 × 1,116.63
4. Step 4: Simplify right side
   1,231.47x = 2,056,480.72
5. Step 5: Solve for x
   x = 2,056,480.72/1,231.47
6. Step 6: Final answer
   x = 1,669.94