Finding the Fourth Proportional to 31,051.86, 42,850.69 and 16,904.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,051.86 : 42,850.69 = 16,904.40 : x
2. Step 2: Convert to fraction form
   31,051.86/42,850.69 = 16,904.40/x
3. Step 3: Cross multiply
   31,051.86x = 42,850.69 × 16,904.40
4. Step 4: Simplify right side
   31,051.86x = 724,365,204.04
5. Step 5: Solve for x
   x = 724,365,204.04/31,051.86
6. Step 6: Final answer
   x = 23,327.59