Finding the Fourth Proportional to 218,942.72, 302,141.16 and 118,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   218,942.72 : 302,141.16 = 118,340.72 : x
2. Step 2: Convert to fraction form
   218,942.72/302,141.16 = 118,340.72/x
3. Step 3: Cross multiply
   218,942.72x = 302,141.16 × 118,340.72
4. Step 4: Simplify right side
   218,942.72x = 35,755,602,416.04
5. Step 5: Solve for x
   x = 35,755,602,416.04/218,942.72
6. Step 6: Final answer
   x = 163,310.31