Finding the Fourth Proportional to 2,907.05, 4,362.43 and 1,057.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,907.05 : 4,362.43 = 1,057.99 : x
2. Step 2: Convert to fraction form
   2,907.05/4,362.43 = 1,057.99/x
3. Step 3: Cross multiply
   2,907.05x = 4,362.43 × 1,057.99
4. Step 4: Simplify right side
   2,907.05x = 4,615,407.32
5. Step 5: Solve for x
   x = 4,615,407.32/2,907.05
6. Step 6: Final answer
   x = 1,587.66