Finding the Fourth Proportional to 2,073.90, 3,106.52 and 920.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.90 : 3,106.52 = 920.46 : x
2. Step 2: Convert to fraction form
   2,073.90/3,106.52 = 920.46/x
3. Step 3: Cross multiply
   2,073.90x = 3,106.52 × 920.46
4. Step 4: Simplify right side
   2,073.90x = 2,859,427.40
5. Step 5: Solve for x
   x = 2,859,427.40/2,073.90
6. Step 6: Final answer
   x = 1,378.77