Finding the Fourth Proportional to 161,583.72, 242,088.86 and 137,971.56

Step by Step Solution

1. Step 1: Write the proportion equation
   161,583.72 : 242,088.86 = 137,971.56 : x
2. Step 2: Convert to fraction form
   161,583.72/242,088.86 = 137,971.56/x
3. Step 3: Cross multiply
   161,583.72x = 242,088.86 × 137,971.56
4. Step 4: Simplify right side
   161,583.72x = 33,401,377,672.82
5. Step 5: Solve for x
   x = 33,401,377,672.82/161,583.72
6. Step 6: Final answer
   x = 206,712.52