Finding the Fourth Proportional to 71,895.33, 107,858.79 and 21,979.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,895.33 : 107,858.79 = 21,979.31 : x
2. Step 2: Convert to fraction form
   71,895.33/107,858.79 = 21,979.31/x
3. Step 3: Cross multiply
   71,895.33x = 107,858.79 × 21,979.31
4. Step 4: Simplify right side
   71,895.33x = 2,370,661,242.34
5. Step 5: Solve for x
   x = 2,370,661,242.34/71,895.33
6. Step 6: Final answer
   x = 32,973.79