Finding the Fourth Proportional to 31,687.10, 47,530.53 and 7,994.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,687.10 : 47,530.53 = 7,994.72 : x
2. Step 2: Convert to fraction form
   31,687.10/47,530.53 = 7,994.72/x
3. Step 3: Cross multiply
   31,687.10x = 47,530.53 × 7,994.72
4. Step 4: Simplify right side
   31,687.10x = 379,993,041.15
5. Step 5: Solve for x
   x = 379,993,041.15/31,687.10
6. Step 6: Final answer
   x = 11,992.04