Finding the Fourth Proportional to 7,196.99, 9,929.90 and 4,213.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,196.99 : 9,929.90 = 4,213.55 : x
2. Step 2: Convert to fraction form
   7,196.99/9,929.90 = 4,213.55/x
3. Step 3: Cross multiply
   7,196.99x = 9,929.90 × 4,213.55
4. Step 4: Simplify right side
   7,196.99x = 41,840,059.43
5. Step 5: Solve for x
   x = 41,840,059.43/7,196.99
6. Step 6: Final answer
   x = 5,813.55