Finding the Fourth Proportional to 123,352.05, 170,172.76 and 72,380.37

Step by Step Solution

1. Step 1: Write the proportion equation
   123,352.05 : 170,172.76 = 72,380.37 : x
2. Step 2: Convert to fraction form
   123,352.05/170,172.76 = 72,380.37/x
3. Step 3: Cross multiply
   123,352.05x = 170,172.76 × 72,380.37
4. Step 4: Simplify right side
   123,352.05x = 12,317,167,332.72
5. Step 5: Solve for x
   x = 12,317,167,332.72/123,352.05
6. Step 6: Final answer
   x = 99,853.77