Finding the Fourth Proportional to 626,978.32, 865,229.88 and 340,498.48

Step by Step Solution

1. Step 1: Write the proportion equation
   626,978.32 : 865,229.88 = 340,498.48 : x
2. Step 2: Convert to fraction form
   626,978.32/865,229.88 = 340,498.48/x
3. Step 3: Cross multiply
   626,978.32x = 865,229.88 × 340,498.48
4. Step 4: Simplify right side
   626,978.32x = 294,609,458,990.58
5. Step 5: Solve for x
   x = 294,609,458,990.58/626,978.32
6. Step 6: Final answer
   x = 469,887.79