Finding the Fourth Proportional to 1,189.88, 1,784.54 and 1,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189.88 : 1,784.54 = 1,131.34 : x
2. Step 2: Convert to fraction form
   1,189.88/1,784.54 = 1,131.34/x
3. Step 3: Cross multiply
   1,189.88x = 1,784.54 × 1,131.34
4. Step 4: Simplify right side
   1,189.88x = 2,018,921.48
5. Step 5: Solve for x
   x = 2,018,921.48/1,189.88
6. Step 6: Final answer
   x = 1,696.74