Finding the Fourth Proportional to 123,563.51, 170,553.89 and 71,892.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,563.51 : 170,553.89 = 71,892.76 : x
2. Step 2: Convert to fraction form
   123,563.51/170,553.89 = 71,892.76/x
3. Step 3: Cross multiply
   123,563.51x = 170,553.89 × 71,892.76
4. Step 4: Simplify right side
   123,563.51x = 12,261,589,880.84
5. Step 5: Solve for x
   x = 12,261,589,880.84/123,563.51
6. Step 6: Final answer
   x = 99,233.10