Finding the Fourth Proportional to 31,059.15, 42,860.34 and 16,911.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.15 : 42,860.34 = 16,911.96 : x
2. Step 2: Convert to fraction form
   31,059.15/42,860.34 = 16,911.96/x
3. Step 3: Cross multiply
   31,059.15x = 42,860.34 × 16,911.96
4. Step 4: Simplify right side
   31,059.15x = 724,852,355.67
5. Step 5: Solve for x
   x = 724,852,355.67/31,059.15
6. Step 6: Final answer
   x = 23,337.80