Finding the Fourth Proportional to 2,117.80, 3,172.59 and 1,190.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.80 : 3,172.59 = 1,190.53 : x
2. Step 2: Convert to fraction form
   2,117.80/3,172.59 = 1,190.53/x
3. Step 3: Cross multiply
   2,117.80x = 3,172.59 × 1,190.53
4. Step 4: Simplify right side
   2,117.80x = 3,777,055.64
5. Step 5: Solve for x
   x = 3,777,055.64/2,117.80
6. Step 6: Final answer
   x = 1,783.48