Finding the Fourth Proportional to 116,487.81, 160,384.91 and 105,845.63

Step by Step Solution

1. Step 1: Write the proportion equation
   116,487.81 : 160,384.91 = 105,845.63 : x
2. Step 2: Convert to fraction form
   116,487.81/160,384.91 = 105,845.63/x
3. Step 3: Cross multiply
   116,487.81x = 160,384.91 × 105,845.63
4. Step 4: Simplify right side
   116,487.81x = 16,976,040,510.29
5. Step 5: Solve for x
   x = 16,976,040,510.29/116,487.81
6. Step 6: Final answer
   x = 145,732.33