Finding the Fourth Proportional to 13,181.34, 19,770.54 and 3,320.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,181.34 : 19,770.54 = 3,320.62 : x
2. Step 2: Convert to fraction form
   13,181.34/19,770.54 = 3,320.62/x
3. Step 3: Cross multiply
   13,181.34x = 19,770.54 × 3,320.62
4. Step 4: Simplify right side
   13,181.34x = 65,650,450.53
5. Step 5: Solve for x
   x = 65,650,450.53/13,181.34
6. Step 6: Final answer
   x = 4,980.56