Finding the Fourth Proportional to 31,570.36, 47,345.76 and 10,789

Step by Step Solution

1. Step 1: Write the proportion equation
   31,570.36 : 47,345.76 = 10,789 : x
2. Step 2: Convert to fraction form
   31,570.36/47,345.76 = 10,789/x
3. Step 3: Cross multiply
   31,570.36x = 47,345.76 × 10,789
4. Step 4: Simplify right side
   31,570.36x = 510,813,404.64
5. Step 5: Solve for x
   x = 510,813,404.64/31,570.36
6. Step 6: Final answer
   x = 16,180.16