Finding the Fourth Proportional to 343,099.59, 472,498.69 and 308,816.07

Step by Step Solution

1. Step 1: Write the proportion equation
   343,099.59 : 472,498.69 = 308,816.07 : x
2. Step 2: Convert to fraction form
   343,099.59/472,498.69 = 308,816.07/x
3. Step 3: Cross multiply
   343,099.59x = 472,498.69 × 308,816.07
4. Step 4: Simplify right side
   343,099.59x = 145,915,188,525.95
5. Step 5: Solve for x
   x = 145,915,188,525.95/343,099.59
6. Step 6: Final answer
   x = 425,285.23