Finding the Fourth Proportional to 646,078.56, 891,573.25 and 359,592.50

Step by Step Solution

1. Step 1: Write the proportion equation
   646,078.56 : 891,573.25 = 359,592.50 : x
2. Step 2: Convert to fraction form
   646,078.56/891,573.25 = 359,592.50/x
3. Step 3: Cross multiply
   646,078.56x = 891,573.25 × 359,592.50
4. Step 4: Simplify right side
   646,078.56x = 320,603,051,901.07
5. Step 5: Solve for x
   x = 320,603,051,901.07/646,078.56
6. Step 6: Final answer
   x = 496,229.21