Finding the Fourth Proportional to 31,091.40, 46,638.18 and 10,031.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.40 : 46,638.18 = 10,031.31 : x
2. Step 2: Convert to fraction form
   31,091.40/46,638.18 = 10,031.31/x
3. Step 3: Cross multiply
   31,091.40x = 46,638.18 × 10,031.31
4. Step 4: Simplify right side
   31,091.40x = 467,842,041.42
5. Step 5: Solve for x
   x = 467,842,041.42/31,091.40
6. Step 6: Final answer
   x = 15,047.31