Finding the Fourth Proportional to 1,379.48, 2,061.34 and 1,048.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.48 : 2,061.34 = 1,048.60 : x
2. Step 2: Convert to fraction form
   1,379.48/2,061.34 = 1,048.60/x
3. Step 3: Cross multiply
   1,379.48x = 2,061.34 × 1,048.60
4. Step 4: Simplify right side
   1,379.48x = 2,161,521.12
5. Step 5: Solve for x
   x = 2,161,521.12/1,379.48
6. Step 6: Final answer
   x = 1,566.91