Finding the Fourth Proportional to 2,907.50, 4,355.40 and 1,345.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,907.50 : 4,355.40 = 1,345.31 : x
2. Step 2: Convert to fraction form
   2,907.50/4,355.40 = 1,345.31/x
3. Step 3: Cross multiply
   2,907.50x = 4,355.40 × 1,345.31
4. Step 4: Simplify right side
   2,907.50x = 5,859,362.77
5. Step 5: Solve for x
   x = 5,859,362.77/2,907.50
6. Step 6: Final answer
   x = 2,015.26