Finding the Fourth Proportional to 221,792.94, 306,080.55 and 123,678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   221,792.94 : 306,080.55 = 123,678.42 : x
2. Step 2: Convert to fraction form
   221,792.94/306,080.55 = 123,678.42/x
3. Step 3: Cross multiply
   221,792.94x = 306,080.55 × 123,678.42
4. Step 4: Simplify right side
   221,792.94x = 37,855,558,816.73
5. Step 5: Solve for x
   x = 37,855,558,816.73/221,792.94
6. Step 6: Final answer
   x = 170,679.73