Finding the Fourth Proportional to 1,950.31, 2,923.32 and 780.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,950.31 : 2,923.32 = 780.03 : x
2. Step 2: Convert to fraction form
   1,950.31/2,923.32 = 780.03/x
3. Step 3: Cross multiply
   1,950.31x = 2,923.32 × 780.03
4. Step 4: Simplify right side
   1,950.31x = 2,280,280.22
5. Step 5: Solve for x
   x = 2,280,280.22/1,950.31
6. Step 6: Final answer
   x = 1,169.19