Finding the Fourth Proportional to 31,059.05, 42,861.45 and 16,911.99

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.05 : 42,861.45 = 16,911.99 : x
2. Step 2: Convert to fraction form
   31,059.05/42,861.45 = 16,911.99/x
3. Step 3: Cross multiply
   31,059.05x = 42,861.45 × 16,911.99
4. Step 4: Simplify right side
   31,059.05x = 724,872,477.21
5. Step 5: Solve for x
   x = 724,872,477.21/31,059.05
6. Step 6: Final answer
   x = 23,338.53