Finding the Fourth Proportional to 111,643.23, 168,209.52 and 100,981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   111,643.23 : 168,209.52 = 100,981.92 : x
2. Step 2: Convert to fraction form
   111,643.23/168,209.52 = 100,981.92/x
3. Step 3: Cross multiply
   111,643.23x = 168,209.52 × 100,981.92
4. Step 4: Simplify right side
   111,643.23x = 16,986,120,291.88
5. Step 5: Solve for x
   x = 16,986,120,291.88/111,643.23
6. Step 6: Final answer
   x = 152,146.44