Finding the Fourth Proportional to 89,284.16, 123,216 and 53,480

Step by Step Solution

1. Step 1: Write the proportion equation
   89,284.16 : 123,216 = 53,480 : x
2. Step 2: Convert to fraction form
   89,284.16/123,216 = 53,480/x
3. Step 3: Cross multiply
   89,284.16x = 123,216 × 53,480
4. Step 4: Simplify right side
   89,284.16x = 6,589,591,680
5. Step 5: Solve for x
   x = 6,589,591,680/89,284.16
6. Step 6: Final answer
   x = 73,804.71