Finding the Fourth Proportional to 2,308.10, 3,460.93 and 920.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.10 : 3,460.93 = 920.30 : x
2. Step 2: Convert to fraction form
   2,308.10/3,460.93 = 920.30/x
3. Step 3: Cross multiply
   2,308.10x = 3,460.93 × 920.30
4. Step 4: Simplify right side
   2,308.10x = 3,185,093.88
5. Step 5: Solve for x
   x = 3,185,093.88/2,308.10
6. Step 6: Final answer
   x = 1,379.96