Finding the Fourth Proportional to 47,405.52, 71,112.42 and 12,345.12

Step by Step Solution

1. Step 1: Write the proportion equation
   47,405.52 : 71,112.42 = 12,345.12 : x
2. Step 2: Convert to fraction form
   47,405.52/71,112.42 = 12,345.12/x
3. Step 3: Cross multiply
   47,405.52x = 71,112.42 × 12,345.12
4. Step 4: Simplify right side
   47,405.52x = 877,891,358.39
5. Step 5: Solve for x
   x = 877,891,358.39/47,405.52
6. Step 6: Final answer
   x = 18,518.76