Finding the Fourth Proportional to 1,141.15, 1,710.95 and 620.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.15 : 1,710.95 = 620.71 : x
2. Step 2: Convert to fraction form
   1,141.15/1,710.95 = 620.71/x
3. Step 3: Cross multiply
   1,141.15x = 1,710.95 × 620.71
4. Step 4: Simplify right side
   1,141.15x = 1,061,995.22
5. Step 5: Solve for x
   x = 1,061,995.22/1,141.15
6. Step 6: Final answer
   x = 930.64