Finding the Fourth Proportional to 1,085.86, 1,628.52 and 492.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.86 : 1,628.52 = 492.94 : x
2. Step 2: Convert to fraction form
   1,085.86/1,628.52 = 492.94/x
3. Step 3: Cross multiply
   1,085.86x = 1,628.52 × 492.94
4. Step 4: Simplify right side
   1,085.86x = 802,762.65
5. Step 5: Solve for x
   x = 802,762.65/1,085.86
6. Step 6: Final answer
   x = 739.29