Finding the Fourth Proportional to 31,978.54, 47,964.12 and 8,603.14

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.54 : 47,964.12 = 8,603.14 : x
2. Step 2: Convert to fraction form
   31,978.54/47,964.12 = 8,603.14/x
3. Step 3: Cross multiply
   31,978.54x = 47,964.12 × 8,603.14
4. Step 4: Simplify right side
   31,978.54x = 412,642,039.34
5. Step 5: Solve for x
   x = 412,642,039.34/31,978.54
6. Step 6: Final answer
   x = 12,903.72