Finding the Fourth Proportional to 218,965.17, 302,171.99 and 123,471.89

Step by Step Solution

1. Step 1: Write the proportion equation
   218,965.17 : 302,171.99 = 123,471.89 : x
2. Step 2: Convert to fraction form
   218,965.17/302,171.99 = 123,471.89/x
3. Step 3: Cross multiply
   218,965.17x = 302,171.99 × 123,471.89
4. Step 4: Simplify right side
   218,965.17x = 37,309,748,456.80
5. Step 5: Solve for x
   x = 37,309,748,456.80/218,965.17
6. Step 6: Final answer
   x = 170,391.24