Finding the Fourth Proportional to 218,627.56, 301,672.74 and 123,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   218,627.56 : 301,672.74 = 123,128.20 : x
2. Step 2: Convert to fraction form
   218,627.56/301,672.74 = 123,128.20/x
3. Step 3: Cross multiply
   218,627.56x = 301,672.74 × 123,128.20
4. Step 4: Simplify right side
   218,627.56x = 37,144,421,465.27
5. Step 5: Solve for x
   x = 37,144,421,465.27/218,627.56
6. Step 6: Final answer
   x = 169,898.17