Finding the Fourth Proportional to 89,679.66, 134,453.61 and 42,965.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89,679.66 : 134,453.61 = 42,965.34 : x
2. Step 2: Convert to fraction form
   89,679.66/134,453.61 = 42,965.34/x
3. Step 3: Cross multiply
   89,679.66x = 134,453.61 × 42,965.34
4. Step 4: Simplify right side
   89,679.66x = 5,776,845,067.88
5. Step 5: Solve for x
   x = 5,776,845,067.88/89,679.66
6. Step 6: Final answer
   x = 64,416.45