Finding the Fourth Proportional to 1,379.27, 2,068.83 and 405.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.27 : 2,068.83 = 405.33 : x
2. Step 2: Convert to fraction form
   1,379.27/2,068.83 = 405.33/x
3. Step 3: Cross multiply
   1,379.27x = 2,068.83 × 405.33
4. Step 4: Simplify right side
   1,379.27x = 838,558.86
5. Step 5: Solve for x
   x = 838,558.86/1,379.27
6. Step 6: Final answer
   x = 607.98