Finding the Fourth Proportional to 123,800.88, 171,719.28 and 120,519.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,800.88 : 171,719.28 = 120,519.60 : x
2. Step 2: Convert to fraction form
   123,800.88/171,719.28 = 120,519.60/x
3. Step 3: Cross multiply
   123,800.88x = 171,719.28 × 120,519.60
4. Step 4: Simplify right side
   123,800.88x = 20,695,538,937.89
5. Step 5: Solve for x
   x = 20,695,538,937.89/123,800.88
6. Step 6: Final answer
   x = 167,167.95