Finding the Fourth Proportional to 686,100.25, 946,818.35 and 417,828.25

Step by Step Solution

1. Step 1: Write the proportion equation
   686,100.25 : 946,818.35 = 417,828.25 : x
2. Step 2: Convert to fraction form
   686,100.25/946,818.35 = 417,828.25/x
3. Step 3: Cross multiply
   686,100.25x = 946,818.35 × 417,828.25
4. Step 4: Simplify right side
   686,100.25x = 395,607,454,248.39
5. Step 5: Solve for x
   x = 395,607,454,248.39/686,100.25
6. Step 6: Final answer
   x = 576,602.99