Finding the Fourth Proportional to 10,005.12, 15,010.56 and 4,811.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,005.12 : 15,010.56 = 4,811.04 : x
2. Step 2: Convert to fraction form
   10,005.12/15,010.56 = 4,811.04/x
3. Step 3: Cross multiply
   10,005.12x = 15,010.56 × 4,811.04
4. Step 4: Simplify right side
   10,005.12x = 72,216,404.58
5. Step 5: Solve for x
   x = 72,216,404.58/10,005.12
6. Step 6: Final answer
   x = 7,217.94