Finding the Fourth Proportional to 12,109.32, 18,172.31 and 4,713.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.32 : 18,172.31 = 4,713.84 : x
2. Step 2: Convert to fraction form
   12,109.32/18,172.31 = 4,713.84/x
3. Step 3: Cross multiply
   12,109.32x = 18,172.31 × 4,713.84
4. Step 4: Simplify right side
   12,109.32x = 85,661,338.20
5. Step 5: Solve for x
   x = 85,661,338.20/12,109.32
6. Step 6: Final answer
   x = 7,074.00