Finding the Fourth Proportional to 116,123.78, 160,257.12 and 65,152.64

Step by Step Solution

1. Step 1: Write the proportion equation
   116,123.78 : 160,257.12 = 65,152.64 : x
2. Step 2: Convert to fraction form
   116,123.78/160,257.12 = 65,152.64/x
3. Step 3: Cross multiply
   116,123.78x = 160,257.12 × 65,152.64
4. Step 4: Simplify right side
   116,123.78x = 10,441,174,446.80
5. Step 5: Solve for x
   x = 10,441,174,446.80/116,123.78
6. Step 6: Final answer
   x = 89,914.18