Finding the Fourth Proportional to 123,630.84, 170,650.80 and 72,642.69

Step by Step Solution

1. Step 1: Write the proportion equation
   123,630.84 : 170,650.80 = 72,642.69 : x
2. Step 2: Convert to fraction form
   123,630.84/170,650.80 = 72,642.69/x
3. Step 3: Cross multiply
   123,630.84x = 170,650.80 × 72,642.69
4. Step 4: Simplify right side
   123,630.84x = 12,396,533,162.65
5. Step 5: Solve for x
   x = 12,396,533,162.65/123,630.84
6. Step 6: Final answer
   x = 100,270.56