Finding the Fourth Proportional to 10,312.12, 15,469.89 and 3,385

Step by Step Solution

1. Step 1: Write the proportion equation
   10,312.12 : 15,469.89 = 3,385 : x
2. Step 2: Convert to fraction form
   10,312.12/15,469.89 = 3,385/x
3. Step 3: Cross multiply
   10,312.12x = 15,469.89 × 3,385
4. Step 4: Simplify right side
   10,312.12x = 52,365,577.65
5. Step 5: Solve for x
   x = 52,365,577.65/10,312.12
6. Step 6: Final answer
   x = 5,078.06