Finding the Fourth Proportional to 123,948.72, 171,050.40 and 73,638

Step by Step Solution

1. Step 1: Write the proportion equation
   123,948.72 : 171,050.40 = 73,638 : x
2. Step 2: Convert to fraction form
   123,948.72/171,050.40 = 73,638/x
3. Step 3: Cross multiply
   123,948.72x = 171,050.40 × 73,638
4. Step 4: Simplify right side
   123,948.72x = 12,595,809,355.20
5. Step 5: Solve for x
   x = 12,595,809,355.20/123,948.72
6. Step 6: Final answer
   x = 101,621.13