Finding the Fourth Proportional to 31,116.48, 46,659.36 and 13,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.48 : 46,659.36 = 13,578.72 : x
2. Step 2: Convert to fraction form
   31,116.48/46,659.36 = 13,578.72/x
3. Step 3: Cross multiply
   31,116.48x = 46,659.36 × 13,578.72
4. Step 4: Simplify right side
   31,116.48x = 633,574,384.82
5. Step 5: Solve for x
   x = 633,574,384.82/31,116.48
6. Step 6: Final answer
   x = 20,361.38