Finding the Fourth Proportional to 89,917.76, 123,989.28 and 61,256

Step by Step Solution

1. Step 1: Write the proportion equation
   89,917.76 : 123,989.28 = 61,256 : x
2. Step 2: Convert to fraction form
   89,917.76/123,989.28 = 61,256/x
3. Step 3: Cross multiply
   89,917.76x = 123,989.28 × 61,256
4. Step 4: Simplify right side
   89,917.76x = 7,595,087,335.68
5. Step 5: Solve for x
   x = 7,595,087,335.68/89,917.76
6. Step 6: Final answer
   x = 84,467.04