Finding the Fourth Proportional to 31,582.76, 47,379 and 10,515.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,582.76 : 47,379 = 10,515.58 : x
2. Step 2: Convert to fraction form
   31,582.76/47,379 = 10,515.58/x
3. Step 3: Cross multiply
   31,582.76x = 47,379 × 10,515.58
4. Step 4: Simplify right side
   31,582.76x = 498,217,664.82
5. Step 5: Solve for x
   x = 498,217,664.82/31,582.76
6. Step 6: Final answer
   x = 15,774.99