Finding the Fourth Proportional to 2,693.31, 4,039.56 and 938.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,693.31 : 4,039.56 = 938.58 : x
2. Step 2: Convert to fraction form
   2,693.31/4,039.56 = 938.58/x
3. Step 3: Cross multiply
   2,693.31x = 4,039.56 × 938.58
4. Step 4: Simplify right side
   2,693.31x = 3,791,450.22
5. Step 5: Solve for x
   x = 3,791,450.22/2,693.31
6. Step 6: Final answer
   x = 1,407.73