Finding the Fourth Proportional to 123,469.79, 170,384.81 and 72,481.70

Step by Step Solution

1. Step 1: Write the proportion equation
   123,469.79 : 170,384.81 = 72,481.70 : x
2. Step 2: Convert to fraction form
   123,469.79/170,384.81 = 72,481.70/x
3. Step 3: Cross multiply
   123,469.79x = 170,384.81 × 72,481.70
4. Step 4: Simplify right side
   123,469.79x = 12,349,780,682.98
5. Step 5: Solve for x
   x = 12,349,780,682.98/123,469.79
6. Step 6: Final answer
   x = 100,022.70