Finding the Fourth Proportional to 1,340.10, 2,010.78 and 930.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.10 : 2,010.78 = 930.06 : x
2. Step 2: Convert to fraction form
   1,340.10/2,010.78 = 930.06/x
3. Step 3: Cross multiply
   1,340.10x = 2,010.78 × 930.06
4. Step 4: Simplify right side
   1,340.10x = 1,870,146.05
5. Step 5: Solve for x
   x = 1,870,146.05/1,340.10
6. Step 6: Final answer
   x = 1,395.53