Finding the Fourth Proportional to 7,196.78, 9,931.66 and 4,009.99

Step by Step Solution

1. Step 1: Write the proportion equation
   7,196.78 : 9,931.66 = 4,009.99 : x
2. Step 2: Convert to fraction form
   7,196.78/9,931.66 = 4,009.99/x
3. Step 3: Cross multiply
   7,196.78x = 9,931.66 × 4,009.99
4. Step 4: Simplify right side
   7,196.78x = 39,825,807.63
5. Step 5: Solve for x
   x = 39,825,807.63/7,196.78
6. Step 6: Final answer
   x = 5,533.84