Finding the Fourth Proportional to 1,340.56, 2,009.72 and 930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.56 : 2,009.72 = 930.50 : x
2. Step 2: Convert to fraction form
   1,340.56/2,009.72 = 930.50/x
3. Step 3: Cross multiply
   1,340.56x = 2,009.72 × 930.50
4. Step 4: Simplify right side
   1,340.56x = 1,870,044.27
5. Step 5: Solve for x
   x = 1,870,044.27/1,340.56
6. Step 6: Final answer
   x = 1,394.97