Finding the Fourth Proportional to 89,357.70, 133,832.34 and 42,643.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,357.70 : 133,832.34 = 42,643.38 : x
2. Step 2: Convert to fraction form
   89,357.70/133,832.34 = 42,643.38/x
3. Step 3: Cross multiply
   89,357.70x = 133,832.34 × 42,643.38
4. Step 4: Simplify right side
   89,357.70x = 5,707,063,330.91
5. Step 5: Solve for x
   x = 5,707,063,330.91/89,357.70
6. Step 6: Final answer
   x = 63,867.62