Finding the Fourth Proportional to 1,978.32, 2,965.11 and 922.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.32 : 2,965.11 = 922.71 : x
2. Step 2: Convert to fraction form
   1,978.32/2,965.11 = 922.71/x
3. Step 3: Cross multiply
   1,978.32x = 2,965.11 × 922.71
4. Step 4: Simplify right side
   1,978.32x = 2,735,936.65
5. Step 5: Solve for x
   x = 2,735,936.65/1,978.32
6. Step 6: Final answer
   x = 1,382.96