Finding the Fourth Proportional to 1,379.63, 1,902.69 and 1,006.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.63 : 1,902.69 = 1,006.48 : x
2. Step 2: Convert to fraction form
   1,379.63/1,902.69 = 1,006.48/x
3. Step 3: Cross multiply
   1,379.63x = 1,902.69 × 1,006.48
4. Step 4: Simplify right side
   1,379.63x = 1,915,011.11
5. Step 5: Solve for x
   x = 1,915,011.11/1,379.63
6. Step 6: Final answer
   x = 1,388.06