Finding the Fourth Proportional to 1,153.37, 1,718.87 and 1,116.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.37 : 1,718.87 = 1,116.47 : x
2. Step 2: Convert to fraction form
   1,153.37/1,718.87 = 1,116.47/x
3. Step 3: Cross multiply
   1,153.37x = 1,718.87 × 1,116.47
4. Step 4: Simplify right side
   1,153.37x = 1,919,052.61
5. Step 5: Solve for x
   x = 1,919,052.61/1,153.37
6. Step 6: Final answer
   x = 1,663.87