Finding the Fourth Proportional to 89,434, 134,214.18 and 42,690.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89,434 : 134,214.18 = 42,690.52 : x
2. Step 2: Convert to fraction form
   89,434/134,214.18 = 42,690.52/x
3. Step 3: Cross multiply
   89,434x = 134,214.18 × 42,690.52
4. Step 4: Simplify right side
   89,434x = 5,729,673,135.57
5. Step 5: Solve for x
   x = 5,729,673,135.57/89,434
6. Step 6: Final answer
   x = 64,065.94