Finding the Fourth Proportional to 1,186.45, 1,770.89 and 1,113.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.45 : 1,770.89 = 1,113.49 : x
2. Step 2: Convert to fraction form
   1,186.45/1,770.89 = 1,113.49/x
3. Step 3: Cross multiply
   1,186.45x = 1,770.89 × 1,113.49
4. Step 4: Simplify right side
   1,186.45x = 1,971,868.31
5. Step 5: Solve for x
   x = 1,971,868.31/1,186.45
6. Step 6: Final answer
   x = 1,661.99