Finding the Fourth Proportional to 31,031.07, 42,823.79 and 16,884.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,031.07 : 42,823.79 = 16,884.83 : x
2. Step 2: Convert to fraction form
   31,031.07/42,823.79 = 16,884.83/x
3. Step 3: Cross multiply
   31,031.07x = 42,823.79 × 16,884.83
4. Step 4: Simplify right side
   31,031.07x = 723,072,115.56
5. Step 5: Solve for x
   x = 723,072,115.56/31,031.07
6. Step 6: Final answer
   x = 23,301.55