Finding the Fourth Proportional to 345,147.30, 517,284.72 and 155,405.61

Step by Step Solution

1. Step 1: Write the proportion equation
   345,147.30 : 517,284.72 = 155,405.61 : x
2. Step 2: Convert to fraction form
   345,147.30/517,284.72 = 155,405.61/x
3. Step 3: Cross multiply
   345,147.30x = 517,284.72 × 155,405.61
4. Step 4: Simplify right side
   345,147.30x = 80,388,947,455.28
5. Step 5: Solve for x
   x = 80,388,947,455.28/345,147.30
6. Step 6: Final answer
   x = 232,912.00