Finding the Fourth Proportional to 89,433, 134,212.68 and 42,689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89,433 : 134,212.68 = 42,689.52 : x
2. Step 2: Convert to fraction form
   89,433/134,212.68 = 42,689.52/x
3. Step 3: Cross multiply
   89,433x = 134,212.68 × 42,689.52
4. Step 4: Simplify right side
   89,433x = 5,729,474,887.11
5. Step 5: Solve for x
   x = 5,729,474,887.11/89,433
6. Step 6: Final answer
   x = 64,064.44