Finding the Fourth Proportional to 12,845.10, 17,723.52 and 7,811.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,845.10 : 17,723.52 = 7,811.94 : x
2. Step 2: Convert to fraction form
   12,845.10/17,723.52 = 7,811.94/x
3. Step 3: Cross multiply
   12,845.10x = 17,723.52 × 7,811.94
4. Step 4: Simplify right side
   12,845.10x = 138,455,074.83
5. Step 5: Solve for x
   x = 138,455,074.83/12,845.10
6. Step 6: Final answer
   x = 10,778.82