Finding the Fourth Proportional to 123,353.56, 170,174.83 and 72,381.88

Step by Step Solution

1. Step 1: Write the proportion equation
   123,353.56 : 170,174.83 = 72,381.88 : x
2. Step 2: Convert to fraction form
   123,353.56/170,174.83 = 72,381.88/x
3. Step 3: Cross multiply
   123,353.56x = 170,174.83 × 72,381.88
4. Step 4: Simplify right side
   123,353.56x = 12,317,574,124.08
5. Step 5: Solve for x
   x = 12,317,574,124.08/123,353.56
6. Step 6: Final answer
   x = 99,855.85