Finding the Fourth Proportional to 105,354.72, 145,388.16 and 62,969.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,354.72 : 145,388.16 = 62,969.76 : x
2. Step 2: Convert to fraction form
   105,354.72/145,388.16 = 62,969.76/x
3. Step 3: Cross multiply
   105,354.72x = 145,388.16 × 62,969.76
4. Step 4: Simplify right side
   105,354.72x = 9,155,057,542.04
5. Step 5: Solve for x
   x = 9,155,057,542.04/105,354.72
6. Step 6: Final answer
   x = 86,897.46