Finding the Fourth Proportional to 31,058.61, 42,860.70 and 16,911.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,058.61 : 42,860.70 = 16,911.42 : x
2. Step 2: Convert to fraction form
   31,058.61/42,860.70 = 16,911.42/x
3. Step 3: Cross multiply
   31,058.61x = 42,860.70 × 16,911.42
4. Step 4: Simplify right side
   31,058.61x = 724,835,299.19
5. Step 5: Solve for x
   x = 724,835,299.19/31,058.61
6. Step 6: Final answer
   x = 23,337.66