Finding the Fourth Proportional to 2,307.09, 3,458.51 and 920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,307.09 : 3,458.51 = 920.10 : x
2. Step 2: Convert to fraction form
   2,307.09/3,458.51 = 920.10/x
3. Step 3: Cross multiply
   2,307.09x = 3,458.51 × 920.10
4. Step 4: Simplify right side
   2,307.09x = 3,182,157.76
5. Step 5: Solve for x
   x = 3,182,157.76/2,307.09
6. Step 6: Final answer
   x = 1,379.30