Finding the Fourth Proportional to 648,778, 895,338.96 and 358,404.55

Step by Step Solution

1. Step 1: Write the proportion equation
   648,778 : 895,338.96 = 358,404.55 : x
2. Step 2: Convert to fraction form
   648,778/895,338.96 = 358,404.55/x
3. Step 3: Cross multiply
   648,778x = 895,338.96 × 358,404.55
4. Step 4: Simplify right side
   648,778x = 320,893,557,056.27
5. Step 5: Solve for x
   x = 320,893,557,056.27/648,778
6. Step 6: Final answer
   x = 494,612.27