Finding the Fourth Proportional to 31,501.35, 47,258.69 and 10,440.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,501.35 : 47,258.69 = 10,440.20 : x
2. Step 2: Convert to fraction form
   31,501.35/47,258.69 = 10,440.20/x
3. Step 3: Cross multiply
   31,501.35x = 47,258.69 × 10,440.20
4. Step 4: Simplify right side
   31,501.35x = 493,389,886.84
5. Step 5: Solve for x
   x = 493,389,886.84/31,501.35
6. Step 6: Final answer
   x = 15,662.50