Finding the Fourth Proportional to 1,191.98, 1,641.54 and 1,166.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.98 : 1,641.54 = 1,166.54 : x
2. Step 2: Convert to fraction form
   1,191.98/1,641.54 = 1,166.54/x
3. Step 3: Cross multiply
   1,191.98x = 1,641.54 × 1,166.54
4. Step 4: Simplify right side
   1,191.98x = 1,914,922.07
5. Step 5: Solve for x
   x = 1,914,922.07/1,191.98
6. Step 6: Final answer
   x = 1,606.51