Finding the Fourth Proportional to 1,068.65, 1,601.83 and 548.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.65 : 1,601.83 = 548.10 : x
2. Step 2: Convert to fraction form
   1,068.65/1,601.83 = 548.10/x
3. Step 3: Cross multiply
   1,068.65x = 1,601.83 × 548.10
4. Step 4: Simplify right side
   1,068.65x = 877,963.71
5. Step 5: Solve for x
   x = 877,963.71/1,068.65
6. Step 6: Final answer
   x = 821.56