Finding the Fourth Proportional to 31,071.48, 42,879.12 and 16,924.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.48 : 42,879.12 = 16,924.32 : x
2. Step 2: Convert to fraction form
   31,071.48/42,879.12 = 16,924.32/x
3. Step 3: Cross multiply
   31,071.48x = 42,879.12 × 16,924.32
4. Step 4: Simplify right side
   31,071.48x = 725,699,948.20
5. Step 5: Solve for x
   x = 725,699,948.20/31,071.48
6. Step 6: Final answer
   x = 23,355.82