Finding the Fourth Proportional to 71,131.16, 106,696.82 and 18,540.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,131.16 : 106,696.82 = 18,540.60 : x
2. Step 2: Convert to fraction form
   71,131.16/106,696.82 = 18,540.60/x
3. Step 3: Cross multiply
   71,131.16x = 106,696.82 × 18,540.60
4. Step 4: Simplify right side
   71,131.16x = 1,978,223,060.89
5. Step 5: Solve for x
   x = 1,978,223,060.89/71,131.16
6. Step 6: Final answer
   x = 27,810.92