Finding the Fourth Proportional to 123,801.55, 170,846.84 and 72,816.43

Step by Step Solution

1. Step 1: Write the proportion equation
   123,801.55 : 170,846.84 = 72,816.43 : x
2. Step 2: Convert to fraction form
   123,801.55/170,846.84 = 72,816.43/x
3. Step 3: Cross multiply
   123,801.55x = 170,846.84 × 72,816.43
4. Step 4: Simplify right side
   123,801.55x = 12,440,456,965.58
5. Step 5: Solve for x
   x = 12,440,456,965.58/123,801.55
6. Step 6: Final answer
   x = 100,487.09