Finding the Fourth Proportional to 1,004.98, 1,386.82 and 556.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.98 : 1,386.82 = 556.82 : x
2. Step 2: Convert to fraction form
   1,004.98/1,386.82 = 556.82/x
3. Step 3: Cross multiply
   1,004.98x = 1,386.82 × 556.82
4. Step 4: Simplify right side
   1,004.98x = 772,206.33
5. Step 5: Solve for x
   x = 772,206.33/1,004.98
6. Step 6: Final answer
   x = 768.38