Finding the Fourth Proportional to 404,903, 607,722.84 and 215,522.58

Step by Step Solution

1. Step 1: Write the proportion equation
   404,903 : 607,722.84 = 215,522.58 : x
2. Step 2: Convert to fraction form
   404,903/607,722.84 = 215,522.58/x
3. Step 3: Cross multiply
   404,903x = 607,722.84 × 215,522.58
4. Step 4: Simplify right side
   404,903x = 130,977,994,401.73
5. Step 5: Solve for x
   x = 130,977,994,401.73/404,903
6. Step 6: Final answer
   x = 323,479.93