Finding the Fourth Proportional to 111,939.30, 168,038.55 and 67,616.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,939.30 : 168,038.55 = 67,616.10 : x
2. Step 2: Convert to fraction form
   111,939.30/168,038.55 = 67,616.10/x
3. Step 3: Cross multiply
   111,939.30x = 168,038.55 × 67,616.10
4. Step 4: Simplify right side
   111,939.30x = 11,362,111,400.66
5. Step 5: Solve for x
   x = 11,362,111,400.66/111,939.30
6. Step 6: Final answer
   x = 101,502.43