Finding the Fourth Proportional to 123,384.32, 170,260.08 and 72,391.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,384.32 : 170,260.08 = 72,391.72 : x
2. Step 2: Convert to fraction form
   123,384.32/170,260.08 = 72,391.72/x
3. Step 3: Cross multiply
   123,384.32x = 170,260.08 × 72,391.72
4. Step 4: Simplify right side
   123,384.32x = 12,325,420,038.54
5. Step 5: Solve for x
   x = 12,325,420,038.54/123,384.32
6. Step 6: Final answer
   x = 99,894.54