Finding the Fourth Proportional to 105,697.86, 145,863.63 and 63,245.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,697.86 : 145,863.63 = 63,245.94 : x
2. Step 2: Convert to fraction form
   105,697.86/145,863.63 = 63,245.94/x
3. Step 3: Cross multiply
   105,697.86x = 145,863.63 × 63,245.94
4. Step 4: Simplify right side
   105,697.86x = 9,225,282,391.16
5. Step 5: Solve for x
   x = 9,225,282,391.16/105,697.86
6. Step 6: Final answer
   x = 87,279.75