Finding the Fourth Proportional to 1,191.12, 1,784.58 and 670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.12 : 1,784.58 = 670.50 : x
2. Step 2: Convert to fraction form
   1,191.12/1,784.58 = 670.50/x
3. Step 3: Cross multiply
   1,191.12x = 1,784.58 × 670.50
4. Step 4: Simplify right side
   1,191.12x = 1,196,560.89
5. Step 5: Solve for x
   x = 1,196,560.89/1,191.12
6. Step 6: Final answer
   x = 1,004.57