Finding the Fourth Proportional to 105,454.92, 145,564.82 and 65,199.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,454.92 : 145,564.82 = 65,199.56 : x
2. Step 2: Convert to fraction form
   105,454.92/145,564.82 = 65,199.56/x
3. Step 3: Cross multiply
   105,454.92x = 145,564.82 × 65,199.56
4. Step 4: Simplify right side
   105,454.92x = 9,490,762,215.48
5. Step 5: Solve for x
   x = 9,490,762,215.48/105,454.92
6. Step 6: Final answer
   x = 89,998.29