Finding the Fourth Proportional to 116,328.47, 160,529.78 and 64,645.39

Step by Step Solution

1. Step 1: Write the proportion equation
   116,328.47 : 160,529.78 = 64,645.39 : x
2. Step 2: Convert to fraction form
   116,328.47/160,529.78 = 64,645.39/x
3. Step 3: Cross multiply
   116,328.47x = 160,529.78 × 64,645.39
4. Step 4: Simplify right side
   116,328.47x = 10,377,510,234.71
5. Step 5: Solve for x
   x = 10,377,510,234.71/116,328.47
6. Step 6: Final answer
   x = 89,208.69