Finding the Fourth Proportional to 31,051.87, 42,851.74 and 16,904.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,051.87 : 42,851.74 = 16,904.81 : x
2. Step 2: Convert to fraction form
   31,051.87/42,851.74 = 16,904.81/x
3. Step 3: Cross multiply
   31,051.87x = 42,851.74 × 16,904.81
4. Step 4: Simplify right side
   31,051.87x = 724,400,513.04
5. Step 5: Solve for x
   x = 724,400,513.04/31,051.87
6. Step 6: Final answer
   x = 23,328.73