Finding the Fourth Proportional to 31,056.51, 42,858 and 16,909.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.51 : 42,858 = 16,909.38 : x
2. Step 2: Convert to fraction form
   31,056.51/42,858 = 16,909.38/x
3. Step 3: Cross multiply
   31,056.51x = 42,858 × 16,909.38
4. Step 4: Simplify right side
   31,056.51x = 724,702,208.04
5. Step 5: Solve for x
   x = 724,702,208.04/31,056.51
6. Step 6: Final answer
   x = 23,334.95