Finding the Fourth Proportional to 89,610.44, 123,395.47 and 87,621.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89,610.44 : 123,395.47 = 87,621.43 : x
2. Step 2: Convert to fraction form
   89,610.44/123,395.47 = 87,621.43/x
3. Step 3: Cross multiply
   89,610.44x = 123,395.47 × 87,621.43
4. Step 4: Simplify right side
   89,610.44x = 10,812,087,536.92
5. Step 5: Solve for x
   x = 10,812,087,536.92/89,610.44
6. Step 6: Final answer
   x = 120,656.56