Finding the Fourth Proportional to 7,196.45, 9,931.80 and 4,212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,196.45 : 9,931.80 = 4,212.10 : x
2. Step 2: Convert to fraction form
   7,196.45/9,931.80 = 4,212.10/x
3. Step 3: Cross multiply
   7,196.45x = 9,931.80 × 4,212.10
4. Step 4: Simplify right side
   7,196.45x = 41,833,685.12
5. Step 5: Solve for x
   x = 41,833,685.12/7,196.45
6. Step 6: Final answer
   x = 5,813.10