Finding the Fourth Proportional to 31,308.76, 46,968.59 and 13,778.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,308.76 : 46,968.59 = 13,778.12 : x
2. Step 2: Convert to fraction form
   31,308.76/46,968.59 = 13,778.12/x
3. Step 3: Cross multiply
   31,308.76x = 46,968.59 × 13,778.12
4. Step 4: Simplify right side
   31,308.76x = 647,138,800.36
5. Step 5: Solve for x
   x = 647,138,800.36/31,308.76
6. Step 6: Final answer
   x = 20,669.58