Finding the Fourth Proportional to 105,111.28, 145,027.32 and 67,436.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,111.28 : 145,027.32 = 67,436.56 : x
2. Step 2: Convert to fraction form
   105,111.28/145,027.32 = 67,436.56/x
3. Step 3: Cross multiply
   105,111.28x = 145,027.32 × 67,436.56
4. Step 4: Simplify right side
   105,111.28x = 9,780,143,566.82
5. Step 5: Solve for x
   x = 9,780,143,566.82/105,111.28
6. Step 6: Final answer
   x = 93,045.61