Finding the Fourth Proportional to 123,306.48, 170,071.38 and 74,908.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,306.48 : 170,071.38 = 74,908.20 : x
2. Step 2: Convert to fraction form
   123,306.48/170,071.38 = 74,908.20/x
3. Step 3: Cross multiply
   123,306.48x = 170,071.38 × 74,908.20
4. Step 4: Simplify right side
   123,306.48x = 12,739,740,947.32
5. Step 5: Solve for x
   x = 12,739,740,947.32/123,306.48
6. Step 6: Final answer
   x = 103,317.69