Finding the Fourth Proportional to 1,400.76, 2,099.78 and 670.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.76 : 2,099.78 = 670.16 : x
2. Step 2: Convert to fraction form
   1,400.76/2,099.78 = 670.16/x
3. Step 3: Cross multiply
   1,400.76x = 2,099.78 × 670.16
4. Step 4: Simplify right side
   1,400.76x = 1,407,188.56
5. Step 5: Solve for x
   x = 1,407,188.56/1,400.76
6. Step 6: Final answer
   x = 1,004.59