Finding the Fourth Proportional to 31,380.87, 47,071.28 and 8,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,380.87 : 47,071.28 = 8,007.31 : x
2. Step 2: Convert to fraction form
   31,380.87/47,071.28 = 8,007.31/x
3. Step 3: Cross multiply
   31,380.87x = 47,071.28 × 8,007.31
4. Step 4: Simplify right side
   31,380.87x = 376,914,100.10
5. Step 5: Solve for x
   x = 376,914,100.10/31,380.87
6. Step 6: Final answer
   x = 12,010.95