Finding the Fourth Proportional to 2,186.66, 3,017.42 and 1,191.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.66 : 3,017.42 = 1,191.93 : x
2. Step 2: Convert to fraction form
   2,186.66/3,017.42 = 1,191.93/x
3. Step 3: Cross multiply
   2,186.66x = 3,017.42 × 1,191.93
4. Step 4: Simplify right side
   2,186.66x = 3,596,557.59
5. Step 5: Solve for x
   x = 3,596,557.59/2,186.66
6. Step 6: Final answer
   x = 1,644.77