Finding the Fourth Proportional to 219,208.72, 302,516.60 and 123,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   219,208.72 : 302,516.60 = 123,718.72 : x
2. Step 2: Convert to fraction form
   219,208.72/302,516.60 = 123,718.72/x
3. Step 3: Cross multiply
   219,208.72x = 302,516.60 × 123,718.72
4. Step 4: Simplify right side
   219,208.72x = 37,426,966,530.75
5. Step 5: Solve for x
   x = 37,426,966,530.75/219,208.72
6. Step 6: Final answer
   x = 170,736.67