Finding the Fourth Proportional to 116,406.36, 160,641.90 and 66,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,406.36 : 160,641.90 = 66,105.72 : x
2. Step 2: Convert to fraction form
   116,406.36/160,641.90 = 66,105.72/x
3. Step 3: Cross multiply
   116,406.36x = 160,641.90 × 66,105.72
4. Step 4: Simplify right side
   116,406.36x = 10,619,348,461.67
5. Step 5: Solve for x
   x = 10,619,348,461.67/116,406.36
6. Step 6: Final answer
   x = 91,226.53