Finding the Fourth Proportional to 1,079.06, 1,618.83 and 309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.06 : 1,618.83 = 309.50 : x
2. Step 2: Convert to fraction form
   1,079.06/1,618.83 = 309.50/x
3. Step 3: Cross multiply
   1,079.06x = 1,618.83 × 309.50
4. Step 4: Simplify right side
   1,079.06x = 501,027.89
5. Step 5: Solve for x
   x = 501,027.89/1,079.06
6. Step 6: Final answer
   x = 464.32