Finding the Fourth Proportional to 1,039.02, 1,558.69 and 308.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.02 : 1,558.69 = 308.51 : x
2. Step 2: Convert to fraction form
   1,039.02/1,558.69 = 308.51/x
3. Step 3: Cross multiply
   1,039.02x = 1,558.69 × 308.51
4. Step 4: Simplify right side
   1,039.02x = 480,862.89
5. Step 5: Solve for x
   x = 480,862.89/1,039.02
6. Step 6: Final answer
   x = 462.80