Finding the Fourth Proportional to 15,485.99, 21,379.52 and 10,196.18

Step by Step Solution

1. Step 1: Write the proportion equation
   15,485.99 : 21,379.52 = 10,196.18 : x
2. Step 2: Convert to fraction form
   15,485.99/21,379.52 = 10,196.18/x
3. Step 3: Cross multiply
   15,485.99x = 21,379.52 × 10,196.18
4. Step 4: Simplify right side
   15,485.99x = 217,989,276.36
5. Step 5: Solve for x
   x = 217,989,276.36/15,485.99
6. Step 6: Final answer
   x = 14,076.55