Finding the Fourth Proportional to 116,640, 174,985.92 and 42,768

Step by Step Solution

1. Step 1: Write the proportion equation
   116,640 : 174,985.92 = 42,768 : x
2. Step 2: Convert to fraction form
   116,640/174,985.92 = 42,768/x
3. Step 3: Cross multiply
   116,640x = 174,985.92 × 42,768
4. Step 4: Simplify right side
   116,640x = 7,483,797,826.56
5. Step 5: Solve for x
   x = 7,483,797,826.56/116,640
6. Step 6: Final answer
   x = 64,161.50