Finding the Fourth Proportional to 7,351.72, 10,146.34 and 4,209

Step by Step Solution

1. Step 1: Write the proportion equation
   7,351.72 : 10,146.34 = 4,209 : x
2. Step 2: Convert to fraction form
   7,351.72/10,146.34 = 4,209/x
3. Step 3: Cross multiply
   7,351.72x = 10,146.34 × 4,209
4. Step 4: Simplify right side
   7,351.72x = 42,705,945.06
5. Step 5: Solve for x
   x = 42,705,945.06/7,351.72
6. Step 6: Final answer
   x = 5,808.97