Finding the Fourth Proportional to 1,970.27, 2,953.58 and 670.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.27 : 2,953.58 = 670.83 : x
2. Step 2: Convert to fraction form
   1,970.27/2,953.58 = 670.83/x
3. Step 3: Cross multiply
   1,970.27x = 2,953.58 × 670.83
4. Step 4: Simplify right side
   1,970.27x = 1,981,346.72
5. Step 5: Solve for x
   x = 1,981,346.72/1,970.27
6. Step 6: Final answer
   x = 1,005.62