Finding the Fourth Proportional to 105,131.52, 145,048.32 and 67,426.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,131.52 : 145,048.32 = 67,426.56 : x
2. Step 2: Convert to fraction form
   105,131.52/145,048.32 = 67,426.56/x
3. Step 3: Cross multiply
   105,131.52x = 145,048.32 × 67,426.56
4. Step 4: Simplify right side
   105,131.52x = 9,780,109,251.38
5. Step 5: Solve for x
   x = 9,780,109,251.38/105,131.52
6. Step 6: Final answer
   x = 93,027.37