Finding the Fourth Proportional to 9,870.12, 14,805.90 and 3,115.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.12 : 14,805.90 = 3,115.14 : x
2. Step 2: Convert to fraction form
   9,870.12/14,805.90 = 3,115.14/x
3. Step 3: Cross multiply
   9,870.12x = 14,805.90 × 3,115.14
4. Step 4: Simplify right side
   9,870.12x = 46,122,451.33
5. Step 5: Solve for x
   x = 46,122,451.33/9,870.12
6. Step 6: Final answer
   x = 4,672.94