Finding the Fourth Proportional to 407,994.82, 607,891.55 and 385,075.98

Step by Step Solution

1. Step 1: Write the proportion equation
   407,994.82 : 607,891.55 = 385,075.98 : x
2. Step 2: Convert to fraction form
   407,994.82/607,891.55 = 385,075.98/x
3. Step 3: Cross multiply
   407,994.82x = 607,891.55 × 385,075.98
4. Step 4: Simplify right side
   407,994.82x = 234,084,432,424.59
5. Step 5: Solve for x
   x = 234,084,432,424.59/407,994.82
6. Step 6: Final answer
   x = 573,743.64