Finding the Fourth Proportional to 31,783.51, 47,679.69 and 10,729.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,783.51 : 47,679.69 = 10,729.57 : x
2. Step 2: Convert to fraction form
   31,783.51/47,679.69 = 10,729.57/x
3. Step 3: Cross multiply
   31,783.51x = 47,679.69 × 10,729.57
4. Step 4: Simplify right side
   31,783.51x = 511,582,571.43
5. Step 5: Solve for x
   x = 511,582,571.43/31,783.51
6. Step 6: Final answer
   x = 16,095.85