Finding the Fourth Proportional to 105,408.25, 145,440.06 and 64,581.00

Step by Step Solution

1. Step 1: Write the proportion equation
   105,408.25 : 145,440.06 = 64,581.00 : x
2. Step 2: Convert to fraction form
   105,408.25/145,440.06 = 64,581.00/x
3. Step 3: Cross multiply
   105,408.25x = 145,440.06 × 64,581.00
4. Step 4: Simplify right side
   105,408.25x = 9,392,663,727.28
5. Step 5: Solve for x
   x = 9,392,663,727.28/105,408.25
6. Step 6: Final answer
   x = 89,107.48