Finding the Fourth Proportional to 646,075.32, 891,569.10 and 359,577.72

Step by Step Solution

1. Step 1: Write the proportion equation
   646,075.32 : 891,569.10 = 359,577.72 : x
2. Step 2: Convert to fraction form
   646,075.32/891,569.10 = 359,577.72/x
3. Step 3: Cross multiply
   646,075.32x = 891,569.10 × 359,577.72
4. Step 4: Simplify right side
   646,075.32x = 320,588,384,200.45
5. Step 5: Solve for x
   x = 320,588,384,200.45/646,075.32
6. Step 6: Final answer
   x = 496,208.99