Finding the Fourth Proportional to 1,071.31, 1,607.06 and 301.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.31 : 1,607.06 = 301.81 : x
2. Step 2: Convert to fraction form
   1,071.31/1,607.06 = 301.81/x
3. Step 3: Cross multiply
   1,071.31x = 1,607.06 × 301.81
4. Step 4: Simplify right side
   1,071.31x = 485,026.78
5. Step 5: Solve for x
   x = 485,026.78/1,071.31
6. Step 6: Final answer
   x = 452.74