Finding the Fourth Proportional to 31,817.31, 43,929.86 and 19,886.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,817.31 : 43,929.86 = 19,886.01 : x
2. Step 2: Convert to fraction form
   31,817.31/43,929.86 = 19,886.01/x
3. Step 3: Cross multiply
   31,817.31x = 43,929.86 × 19,886.01
4. Step 4: Simplify right side
   31,817.31x = 873,589,535.83
5. Step 5: Solve for x
   x = 873,589,535.83/31,817.31
6. Step 6: Final answer
   x = 27,456.42