Finding the Fourth Proportional to 10,406.12, 15,599.10 and 5,196.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,406.12 : 15,599.10 = 5,196.20 : x
2. Step 2: Convert to fraction form
   10,406.12/15,599.10 = 5,196.20/x
3. Step 3: Cross multiply
   10,406.12x = 15,599.10 × 5,196.20
4. Step 4: Simplify right side
   10,406.12x = 81,056,043.42
5. Step 5: Solve for x
   x = 81,056,043.42/10,406.12
6. Step 6: Final answer
   x = 7,789.27