Finding the Fourth Proportional to 663,233.37, 914,611.83 and 421,095.57

Step by Step Solution

1. Step 1: Write the proportion equation
   663,233.37 : 914,611.83 = 421,095.57 : x
2. Step 2: Convert to fraction form
   663,233.37/914,611.83 = 421,095.57/x
3. Step 3: Cross multiply
   663,233.37x = 914,611.83 × 421,095.57
4. Step 4: Simplify right side
   663,233.37x = 385,138,989,882.59
5. Step 5: Solve for x
   x = 385,138,989,882.59/663,233.37
6. Step 6: Final answer
   x = 580,699.05