Finding the Fourth Proportional to 116,648.30, 160,978.29 and 66,350.54

Step by Step Solution

1. Step 1: Write the proportion equation
   116,648.30 : 160,978.29 = 66,350.54 : x
2. Step 2: Convert to fraction form
   116,648.30/160,978.29 = 66,350.54/x
3. Step 3: Cross multiply
   116,648.30x = 160,978.29 × 66,350.54
4. Step 4: Simplify right side
   116,648.30x = 10,680,996,623.41
5. Step 5: Solve for x
   x = 10,680,996,623.41/116,648.30
6. Step 6: Final answer
   x = 91,565.81