Finding the Fourth Proportional to 1,141.65, 1,713.83 and 648.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.65 : 1,713.83 = 648.45 : x
2. Step 2: Convert to fraction form
   1,141.65/1,713.83 = 648.45/x
3. Step 3: Cross multiply
   1,141.65x = 1,713.83 × 648.45
4. Step 4: Simplify right side
   1,141.65x = 1,111,329.82
5. Step 5: Solve for x
   x = 1,111,329.82/1,141.65
6. Step 6: Final answer
   x = 973.44