Finding the Fourth Proportional to 31,978.99, 47,960.16 and 13,264.33

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.99 : 47,960.16 = 13,264.33 : x
2. Step 2: Convert to fraction form
   31,978.99/47,960.16 = 13,264.33/x
3. Step 3: Cross multiply
   31,978.99x = 47,960.16 × 13,264.33
4. Step 4: Simplify right side
   31,978.99x = 636,159,389.09
5. Step 5: Solve for x
   x = 636,159,389.09/31,978.99
6. Step 6: Final answer
   x = 19,893.04