Finding the Fourth Proportional to 107,142.57, 160,240.82 and 64,905.93

Step by Step Solution

1. Step 1: Write the proportion equation
   107,142.57 : 160,240.82 = 64,905.93 : x
2. Step 2: Convert to fraction form
   107,142.57/160,240.82 = 64,905.93/x
3. Step 3: Cross multiply
   107,142.57x = 160,240.82 × 64,905.93
4. Step 4: Simplify right side
   107,142.57x = 10,400,579,121.53
5. Step 5: Solve for x
   x = 10,400,579,121.53/107,142.57
6. Step 6: Final answer
   x = 97,072.33