Finding the Fourth Proportional to 218,892.72, 302,071.50 and 123,400.20

Step by Step Solution

1. Step 1: Write the proportion equation
   218,892.72 : 302,071.50 = 123,400.20 : x
2. Step 2: Convert to fraction form
   218,892.72/302,071.50 = 123,400.20/x
3. Step 3: Cross multiply
   218,892.72x = 302,071.50 × 123,400.20
4. Step 4: Simplify right side
   218,892.72x = 37,275,683,514.30
5. Step 5: Solve for x
   x = 37,275,683,514.30/218,892.72
6. Step 6: Final answer
   x = 170,292.02