Finding the Fourth Proportional to 31,089.47, 42,902.21 and 16,942.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.47 : 42,902.21 = 16,942.01 : x
2. Step 2: Convert to fraction form
   31,089.47/42,902.21 = 16,942.01/x
3. Step 3: Cross multiply
   31,089.47x = 42,902.21 × 16,942.01
4. Step 4: Simplify right side
   31,089.47x = 726,849,498.69
5. Step 5: Solve for x
   x = 726,849,498.69/31,089.47
6. Step 6: Final answer
   x = 23,379.29