Finding the Fourth Proportional to 71,126.37, 106,708.46 and 21,206.61

Step by Step Solution

1. Step 1: Write the proportion equation
   71,126.37 : 106,708.46 = 21,206.61 : x
2. Step 2: Convert to fraction form
   71,126.37/106,708.46 = 21,206.61/x
3. Step 3: Cross multiply
   71,126.37x = 106,708.46 × 21,206.61
4. Step 4: Simplify right side
   71,126.37x = 2,262,924,588.89
5. Step 5: Solve for x
   x = 2,262,924,588.89/71,126.37
6. Step 6: Final answer
   x = 31,815.55