Finding the Fourth Proportional to 123,873.48, 170,916.12 and 72,888.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,873.48 : 170,916.12 = 72,888.42 : x
2. Step 2: Convert to fraction form
   123,873.48/170,916.12 = 72,888.42/x
3. Step 3: Cross multiply
   123,873.48x = 170,916.12 × 72,888.42
4. Step 4: Simplify right side
   123,873.48x = 12,457,805,939.33
5. Step 5: Solve for x
   x = 12,457,805,939.33/123,873.48
6. Step 6: Final answer
   x = 100,568.79