Finding the Fourth Proportional to 71,145.42, 106,731.78 and 31,702.41

Step by Step Solution

1. Step 1: Write the proportion equation
   71,145.42 : 106,731.78 = 31,702.41 : x
2. Step 2: Convert to fraction form
   71,145.42/106,731.78 = 31,702.41/x
3. Step 3: Cross multiply
   71,145.42x = 106,731.78 × 31,702.41
4. Step 4: Simplify right side
   71,145.42x = 3,383,654,649.59
5. Step 5: Solve for x
   x = 3,383,654,649.59/71,145.42
6. Step 6: Final answer
   x = 47,559.70