Finding the Fourth Proportional to 2,355.31, 3,533.43 and 1,315.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355.31 : 3,533.43 = 1,315.93 : x
2. Step 2: Convert to fraction form
   2,355.31/3,533.43 = 1,315.93/x
3. Step 3: Cross multiply
   2,355.31x = 3,533.43 × 1,315.93
4. Step 4: Simplify right side
   2,355.31x = 4,649,746.54
5. Step 5: Solve for x
   x = 4,649,746.54/2,355.31
6. Step 6: Final answer
   x = 1,974.15