Finding the Fourth Proportional to 1,379.32, 2,066.18 and 683.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.32 : 2,066.18 = 683.90 : x
2. Step 2: Convert to fraction form
   1,379.32/2,066.18 = 683.90/x
3. Step 3: Cross multiply
   1,379.32x = 2,066.18 × 683.90
4. Step 4: Simplify right side
   1,379.32x = 1,413,060.50
5. Step 5: Solve for x
   x = 1,413,060.50/1,379.32
6. Step 6: Final answer
   x = 1,024.46