Finding the Fourth Proportional to 1,379.57, 1,902.51 and 1,064.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.57 : 1,902.51 = 1,064.34 : x
2. Step 2: Convert to fraction form
   1,379.57/1,902.51 = 1,064.34/x
3. Step 3: Cross multiply
   1,379.57x = 1,902.51 × 1,064.34
4. Step 4: Simplify right side
   1,379.57x = 2,024,920.49
5. Step 5: Solve for x
   x = 2,024,920.49/1,379.57
6. Step 6: Final answer
   x = 1,467.79