Finding the Fourth Proportional to 616,705.78, 851,196.18 and 401,470.96

Step by Step Solution

1. Step 1: Write the proportion equation
   616,705.78 : 851,196.18 = 401,470.96 : x
2. Step 2: Convert to fraction form
   616,705.78/851,196.18 = 401,470.96/x
3. Step 3: Cross multiply
   616,705.78x = 851,196.18 × 401,470.96
4. Step 4: Simplify right side
   616,705.78x = 341,730,547,532.93
5. Step 5: Solve for x
   x = 341,730,547,532.93/616,705.78
6. Step 6: Final answer
   x = 554,122.50