Finding the Fourth Proportional to 646,111.21, 891,633.51 and 359,625.15

Step by Step Solution

1. Step 1: Write the proportion equation
   646,111.21 : 891,633.51 = 359,625.15 : x
2. Step 2: Convert to fraction form
   646,111.21/891,633.51 = 359,625.15/x
3. Step 3: Cross multiply
   646,111.21x = 891,633.51 × 359,625.15
4. Step 4: Simplify right side
   646,111.21x = 320,653,834,778.78
5. Step 5: Solve for x
   x = 320,653,834,778.78/646,111.21
6. Step 6: Final answer
   x = 496,282.73