Finding the Fourth Proportional to 31,100.67, 42,905.40 and 19,764.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.67 : 42,905.40 = 19,764.09 : x
2. Step 2: Convert to fraction form
   31,100.67/42,905.40 = 19,764.09/x
3. Step 3: Cross multiply
   31,100.67x = 42,905.40 × 19,764.09
4. Step 4: Simplify right side
   31,100.67x = 847,986,187.09
5. Step 5: Solve for x
   x = 847,986,187.09/31,100.67
6. Step 6: Final answer
   x = 27,265.85