Finding the Fourth Proportional to 116,043, 160,139.50 and 65,745.40

Step by Step Solution

1. Step 1: Write the proportion equation
   116,043 : 160,139.50 = 65,745.40 : x
2. Step 2: Convert to fraction form
   116,043/160,139.50 = 65,745.40/x
3. Step 3: Cross multiply
   116,043x = 160,139.50 × 65,745.40
4. Step 4: Simplify right side
   116,043x = 10,528,435,483.30
5. Step 5: Solve for x
   x = 10,528,435,483.30/116,043
6. Step 6: Final answer
   x = 90,728.74