Finding the Fourth Proportional to 105,364.72, 145,401.96 and 62,979.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,364.72 : 145,401.96 = 62,979.76 : x
2. Step 2: Convert to fraction form
   105,364.72/145,401.96 = 62,979.76/x
3. Step 3: Cross multiply
   105,364.72x = 145,401.96 × 62,979.76
4. Step 4: Simplify right side
   105,364.72x = 9,157,380,544.33
5. Step 5: Solve for x
   x = 9,157,380,544.33/105,364.72
6. Step 6: Final answer
   x = 86,911.26