Finding the Fourth Proportional to 123,485.85, 170,410.50 and 72,488.52

Step by Step Solution

1. Step 1: Write the proportion equation
   123,485.85 : 170,410.50 = 72,488.52 : x
2. Step 2: Convert to fraction form
   123,485.85/170,410.50 = 72,488.52/x
3. Step 3: Cross multiply
   123,485.85x = 170,410.50 × 72,488.52
4. Step 4: Simplify right side
   123,485.85x = 12,352,804,937.46
5. Step 5: Solve for x
   x = 12,352,804,937.46/123,485.85
6. Step 6: Final answer
   x = 100,034.17