Finding the Fourth Proportional to 663,030.81, 914,986.17 and 387,404.82

Step by Step Solution

1. Step 1: Write the proportion equation
   663,030.81 : 914,986.17 = 387,404.82 : x
2. Step 2: Convert to fraction form
   663,030.81/914,986.17 = 387,404.82/x
3. Step 3: Cross multiply
   663,030.81x = 914,986.17 × 387,404.82
4. Step 4: Simplify right side
   663,030.81x = 354,470,052,491.34
5. Step 5: Solve for x
   x = 354,470,052,491.34/663,030.81
6. Step 6: Final answer
   x = 534,620.79