Finding the Fourth Proportional to 89,406, 134,145.72 and 39,459.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,406 : 134,145.72 = 39,459.60 : x
2. Step 2: Convert to fraction form
   89,406/134,145.72 = 39,459.60/x
3. Step 3: Cross multiply
   89,406x = 134,145.72 × 39,459.60
4. Step 4: Simplify right side
   89,406x = 5,293,336,452.91
5. Step 5: Solve for x
   x = 5,293,336,452.91/89,406
6. Step 6: Final answer
   x = 59,205.61