Finding the Fourth Proportional to 1,184.39, 1,634.45 and 687.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,184.39 : 1,634.45 = 687.12 : x
2. Step 2: Convert to fraction form
   1,184.39/1,634.45 = 687.12/x
3. Step 3: Cross multiply
   1,184.39x = 1,634.45 × 687.12
4. Step 4: Simplify right side
   1,184.39x = 1,123,065.00
5. Step 5: Solve for x
   x = 1,123,065.00/1,184.39
6. Step 6: Final answer
   x = 948.23