Finding the Fourth Proportional to 687,584.63, 948,926.83 and 401,196.98

Step by Step Solution

1. Step 1: Write the proportion equation
   687,584.63 : 948,926.83 = 401,196.98 : x
2. Step 2: Convert to fraction form
   687,584.63/948,926.83 = 401,196.98/x
3. Step 3: Cross multiply
   687,584.63x = 948,926.83 × 401,196.98
4. Step 4: Simplify right side
   687,584.63x = 380,706,578,504.56
5. Step 5: Solve for x
   x = 380,706,578,504.56/687,584.63
6. Step 6: Final answer
   x = 553,686.87