Finding the Fourth Proportional to 171,451.72, 257,105.42 and 64,817.64

Step by Step Solution

1. Step 1: Write the proportion equation
   171,451.72 : 257,105.42 = 64,817.64 : x
2. Step 2: Convert to fraction form
   171,451.72/257,105.42 = 64,817.64/x
3. Step 3: Cross multiply
   171,451.72x = 257,105.42 × 64,817.64
4. Step 4: Simplify right side
   171,451.72x = 16,664,966,555.61
5. Step 5: Solve for x
   x = 16,664,966,555.61/171,451.72
6. Step 6: Final answer
   x = 97,199.18