Finding the Fourth Proportional to 31,071.01, 42,878.47 and 16,923.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.01 : 42,878.47 = 16,923.85 : x
2. Step 2: Convert to fraction form
   31,071.01/42,878.47 = 16,923.85/x
3. Step 3: Cross multiply
   31,071.01x = 42,878.47 × 16,923.85
4. Step 4: Simplify right side
   31,071.01x = 725,668,794.51
5. Step 5: Solve for x
   x = 725,668,794.51/31,071.01
6. Step 6: Final answer
   x = 23,355.17