Finding the Fourth Proportional to 116,381.07, 160,667.25 and 78,340.62

Step by Step Solution

1. Step 1: Write the proportion equation
   116,381.07 : 160,667.25 = 78,340.62 : x
2. Step 2: Convert to fraction form
   116,381.07/160,667.25 = 78,340.62/x
3. Step 3: Cross multiply
   116,381.07x = 160,667.25 × 78,340.62
4. Step 4: Simplify right side
   116,381.07x = 12,586,771,978.70
5. Step 5: Solve for x
   x = 12,586,771,978.70/116,381.07
6. Step 6: Final answer
   x = 108,151.37