Finding the Fourth Proportional to 646,074.32, 891,567.72 and 359,576.72

Step by Step Solution

1. Step 1: Write the proportion equation
   646,074.32 : 891,567.72 = 359,576.72 : x
2. Step 2: Convert to fraction form
   646,074.32/891,567.72 = 359,576.72/x
3. Step 3: Cross multiply
   646,074.32x = 891,567.72 × 359,576.72
4. Step 4: Simplify right side
   646,074.32x = 320,586,996,415.48
5. Step 5: Solve for x
   x = 320,586,996,415.48/646,074.32
6. Step 6: Final answer
   x = 496,207.61