Finding the Fourth Proportional to 12,109.42, 18,164.94 and 4,713.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.42 : 18,164.94 = 4,713.40 : x
2. Step 2: Convert to fraction form
   12,109.42/18,164.94 = 4,713.40/x
3. Step 3: Cross multiply
   12,109.42x = 18,164.94 × 4,713.40
4. Step 4: Simplify right side
   12,109.42x = 85,618,628.20
5. Step 5: Solve for x
   x = 85,618,628.20/12,109.42
6. Step 6: Final answer
   x = 7,070.42