Finding the Fourth Proportional to 89,693.41, 134,474.23 and 42,979.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89,693.41 : 134,474.23 = 42,979.09 : x
2. Step 2: Convert to fraction form
   89,693.41/134,474.23 = 42,979.09/x
3. Step 3: Cross multiply
   89,693.41x = 134,474.23 × 42,979.09
4. Step 4: Simplify right side
   89,693.41x = 5,779,580,033.85
5. Step 5: Solve for x
   x = 5,779,580,033.85/89,693.41
6. Step 6: Final answer
   x = 64,437.06