Finding the Fourth Proportional to 2,030.72, 3,046.16 and 919.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,030.72 : 3,046.16 = 919.92 : x
2. Step 2: Convert to fraction form
   2,030.72/3,046.16 = 919.92/x
3. Step 3: Cross multiply
   2,030.72x = 3,046.16 × 919.92
4. Step 4: Simplify right side
   2,030.72x = 2,802,223.51
5. Step 5: Solve for x
   x = 2,802,223.51/2,030.72
6. Step 6: Final answer
   x = 1,379.92