Finding the Fourth Proportional to 223,105.29, 307,883.58 and 121,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   223,105.29 : 307,883.58 = 121,128.72 : x
2. Step 2: Convert to fraction form
   223,105.29/307,883.58 = 121,128.72/x
3. Step 3: Cross multiply
   223,105.29x = 307,883.58 × 121,128.72
4. Step 4: Simplify right side
   223,105.29x = 37,293,543,954.42
5. Step 5: Solve for x
   x = 37,293,543,954.42/223,105.29
6. Step 6: Final answer
   x = 167,156.70