Finding the Fourth Proportional to 31,031.59, 46,464.76 and 21,190.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,031.59 : 46,464.76 = 21,190.09 : x
2. Step 2: Convert to fraction form
   31,031.59/46,464.76 = 21,190.09/x
3. Step 3: Cross multiply
   31,031.59x = 46,464.76 × 21,190.09
4. Step 4: Simplify right side
   31,031.59x = 984,592,446.23
5. Step 5: Solve for x
   x = 984,592,446.23/31,031.59
6. Step 6: Final answer
   x = 31,728.71