Finding the Fourth Proportional to 1,178.93, 1,626.89 and 647.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.93 : 1,626.89 = 647.82 : x
2. Step 2: Convert to fraction form
   1,178.93/1,626.89 = 647.82/x
3. Step 3: Cross multiply
   1,178.93x = 1,626.89 × 647.82
4. Step 4: Simplify right side
   1,178.93x = 1,053,928.64
5. Step 5: Solve for x
   x = 1,053,928.64/1,178.93
6. Step 6: Final answer
   x = 893.97