Finding the Fourth Proportional to 345,105.55, 517,556.17 and 155,456.29

Step by Step Solution

1. Step 1: Write the proportion equation
   345,105.55 : 517,556.17 = 155,456.29 : x
2. Step 2: Convert to fraction form
   345,105.55/517,556.17 = 155,456.29/x
3. Step 3: Cross multiply
   345,105.55x = 517,556.17 × 155,456.29
4. Step 4: Simplify right side
   345,105.55x = 80,457,362,054.81
5. Step 5: Solve for x
   x = 80,457,362,054.81/345,105.55
6. Step 6: Final answer
   x = 233,138.42