Finding the Fourth Proportional to 123,039.34, 169,716.27 and 77,638.03

Step by Step Solution

1. Step 1: Write the proportion equation
   123,039.34 : 169,716.27 = 77,638.03 : x
2. Step 2: Convert to fraction form
   123,039.34/169,716.27 = 77,638.03/x
3. Step 3: Cross multiply
   123,039.34x = 169,716.27 × 77,638.03
4. Step 4: Simplify right side
   123,039.34x = 13,176,436,861.75
5. Step 5: Solve for x
   x = 13,176,436,861.75/123,039.34
6. Step 6: Final answer
   x = 107,091.25