Finding the Fourth Proportional to 31,805.98, 43,901.94 and 19,861.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,805.98 : 43,901.94 = 19,861.72 : x
2. Step 2: Convert to fraction form
   31,805.98/43,901.94 = 19,861.72/x
3. Step 3: Cross multiply
   31,805.98x = 43,901.94 × 19,861.72
4. Step 4: Simplify right side
   31,805.98x = 871,968,039.74
5. Step 5: Solve for x
   x = 871,968,039.74/31,805.98
6. Step 6: Final answer
   x = 27,415.22