Finding the Fourth Proportional to 89,645.89, 134,425.96 and 52,216.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,645.89 : 134,425.96 = 52,216.64 : x
2. Step 2: Convert to fraction form
   89,645.89/134,425.96 = 52,216.64/x
3. Step 3: Cross multiply
   89,645.89x = 134,425.96 × 52,216.64
4. Step 4: Simplify right side
   89,645.89x = 7,019,271,959.97
5. Step 5: Solve for x
   x = 7,019,271,959.97/89,645.89
6. Step 6: Final answer
   x = 78,299.99