Finding the Fourth Proportional to 1,410.72, 2,116.84 and 670.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.72 : 2,116.84 = 670.16 : x
2. Step 2: Convert to fraction form
   1,410.72/2,116.84 = 670.16/x
3. Step 3: Cross multiply
   1,410.72x = 2,116.84 × 670.16
4. Step 4: Simplify right side
   1,410.72x = 1,418,621.49
5. Step 5: Solve for x
   x = 1,418,621.49/1,410.72
6. Step 6: Final answer
   x = 1,005.60