Finding the Fourth Proportional to 105,309, 145,326.42 and 60,622.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,309 : 145,326.42 = 60,622.92 : x
2. Step 2: Convert to fraction form
   105,309/145,326.42 = 60,622.92/x
3. Step 3: Cross multiply
   105,309x = 145,326.42 × 60,622.92
4. Step 4: Simplify right side
   105,309x = 8,810,111,933.55
5. Step 5: Solve for x
   x = 8,810,111,933.55/105,309
6. Step 6: Final answer
   x = 83,659.63