Finding the Fourth Proportional to 71,390.35, 107,085.77 and 18,082.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,390.35 : 107,085.77 = 18,082.31 : x
2. Step 2: Convert to fraction form
   71,390.35/107,085.77 = 18,082.31/x
3. Step 3: Cross multiply
   71,390.35x = 107,085.77 × 18,082.31
4. Step 4: Simplify right side
   71,390.35x = 1,936,357,999.32
5. Step 5: Solve for x
   x = 1,936,357,999.32/71,390.35
6. Step 6: Final answer
   x = 27,123.53