Finding the Fourth Proportional to 89,439.08, 123,383.40 and 64,303.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89,439.08 : 123,383.40 = 64,303.16 : x
2. Step 2: Convert to fraction form
   89,439.08/123,383.40 = 64,303.16/x
3. Step 3: Cross multiply
   89,439.08x = 123,383.40 × 64,303.16
4. Step 4: Simplify right side
   89,439.08x = 7,933,942,511.54
5. Step 5: Solve for x
   x = 7,933,942,511.54/89,439.08
6. Step 6: Final answer
   x = 88,707.78