Finding the Fourth Proportional to 13,072.89, 19,609.16 and 3,212.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.89 : 19,609.16 = 3,212.25 : x
2. Step 2: Convert to fraction form
   13,072.89/19,609.16 = 3,212.25/x
3. Step 3: Cross multiply
   13,072.89x = 19,609.16 × 3,212.25
4. Step 4: Simplify right side
   13,072.89x = 62,989,627.17
5. Step 5: Solve for x
   x = 62,989,627.17/13,072.89
6. Step 6: Final answer
   x = 4,818.34