Finding the Fourth Proportional to 123,872, 170,914.04 and 72,886.96

Step by Step Solution

1. Step 1: Write the proportion equation
   123,872 : 170,914.04 = 72,886.96 : x
2. Step 2: Convert to fraction form
   123,872/170,914.04 = 72,886.96/x
3. Step 3: Cross multiply
   123,872x = 170,914.04 × 72,886.96
4. Step 4: Simplify right side
   123,872x = 12,457,404,796.92
5. Step 5: Solve for x
   x = 12,457,404,796.92/123,872
6. Step 6: Final answer
   x = 100,566.75