Finding the Fourth Proportional to 1,191.71, 1,784.33 and 613.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.71 : 1,784.33 = 613.37 : x
2. Step 2: Convert to fraction form
   1,191.71/1,784.33 = 613.37/x
3. Step 3: Cross multiply
   1,191.71x = 1,784.33 × 613.37
4. Step 4: Simplify right side
   1,191.71x = 1,094,458.19
5. Step 5: Solve for x
   x = 1,094,458.19/1,191.71
6. Step 6: Final answer
   x = 918.39