Finding the Fourth Proportional to 72,217.63, 107,846.59 and 71,435.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,217.63 : 107,846.59 = 71,435.71 : x
2. Step 2: Convert to fraction form
   72,217.63/107,846.59 = 71,435.71/x
3. Step 3: Cross multiply
   72,217.63x = 107,846.59 × 71,435.71
4. Step 4: Simplify right side
   72,217.63x = 7,704,097,727.73
5. Step 5: Solve for x
   x = 7,704,097,727.73/72,217.63
6. Step 6: Final answer
   x = 106,678.91