Finding the Fourth Proportional to 31,121.28, 46,638.18 and 13,554.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.28 : 46,638.18 = 13,554.27 : x
2. Step 2: Convert to fraction form
   31,121.28/46,638.18 = 13,554.27/x
3. Step 3: Cross multiply
   31,121.28x = 46,638.18 × 13,554.27
4. Step 4: Simplify right side
   31,121.28x = 632,146,484.03
5. Step 5: Solve for x
   x = 632,146,484.03/31,121.28
6. Step 6: Final answer
   x = 20,312.35