Finding the Fourth Proportional to 1,190.25, 1,783.98 and 670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.25 : 1,783.98 = 670.50 : x
2. Step 2: Convert to fraction form
   1,190.25/1,783.98 = 670.50/x
3. Step 3: Cross multiply
   1,190.25x = 1,783.98 × 670.50
4. Step 4: Simplify right side
   1,190.25x = 1,196,158.59
5. Step 5: Solve for x
   x = 1,196,158.59/1,190.25
6. Step 6: Final answer
   x = 1,004.96