Finding the Fourth Proportional to 31,518.56, 47,275.68 and 8,144.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,518.56 : 47,275.68 = 8,144.12 : x
2. Step 2: Convert to fraction form
   31,518.56/47,275.68 = 8,144.12/x
3. Step 3: Cross multiply
   31,518.56x = 47,275.68 × 8,144.12
4. Step 4: Simplify right side
   31,518.56x = 385,018,811.00
5. Step 5: Solve for x
   x = 385,018,811.00/31,518.56
6. Step 6: Final answer
   x = 12,215.62