Finding the Fourth Proportional to 1,410.94, 2,115.16 and 670.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.94 : 2,115.16 = 670.10 : x
2. Step 2: Convert to fraction form
   1,410.94/2,115.16 = 670.10/x
3. Step 3: Cross multiply
   1,410.94x = 2,115.16 × 670.10
4. Step 4: Simplify right side
   1,410.94x = 1,417,356.46
5. Step 5: Solve for x
   x = 1,417,356.46/1,410.94
6. Step 6: Final answer
   x = 1,004.55