Finding the Fourth Proportional to 31,812, 43,900.56 and 20,634

Step by Step Solution

1. Step 1: Write the proportion equation
   31,812 : 43,900.56 = 20,634 : x
2. Step 2: Convert to fraction form
   31,812/43,900.56 = 20,634/x
3. Step 3: Cross multiply
   31,812x = 43,900.56 × 20,634
4. Step 4: Simplify right side
   31,812x = 905,844,155.04
5. Step 5: Solve for x
   x = 905,844,155.04/31,812
6. Step 6: Final answer
   x = 28,474.92