Finding the Fourth Proportional to 107,234.72, 160,688.05 and 57,321.91

Step by Step Solution

1. Step 1: Write the proportion equation
   107,234.72 : 160,688.05 = 57,321.91 : x
2. Step 2: Convert to fraction form
   107,234.72/160,688.05 = 57,321.91/x
3. Step 3: Cross multiply
   107,234.72x = 160,688.05 × 57,321.91
4. Step 4: Simplify right side
   107,234.72x = 9,210,945,940.18
5. Step 5: Solve for x
   x = 9,210,945,940.18/107,234.72
6. Step 6: Final answer
   x = 85,895.18