Finding the Fourth Proportional to 143,645.27, 215,560.85 and 64,754.71

Step by Step Solution

1. Step 1: Write the proportion equation
   143,645.27 : 215,560.85 = 64,754.71 : x
2. Step 2: Convert to fraction form
   143,645.27/215,560.85 = 64,754.71/x
3. Step 3: Cross multiply
   143,645.27x = 215,560.85 × 64,754.71
4. Step 4: Simplify right side
   143,645.27x = 13,958,579,466.43
5. Step 5: Solve for x
   x = 13,958,579,466.43/143,645.27
6. Step 6: Final answer
   x = 97,173.96