Finding the Fourth Proportional to 1,039,624.16, 1,559,435.18 and 391,321.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039,624.16 : 1,559,435.18 = 391,321.42 : x
2. Step 2: Convert to fraction form
   1,039,624.16/1,559,435.18 = 391,321.42/x
3. Step 3: Cross multiply
   1,039,624.16x = 1,559,435.18 × 391,321.42
4. Step 4: Simplify right side
   1,039,624.16x = 610,240,389,035.56
5. Step 5: Solve for x
   x = 610,240,389,035.56/1,039,624.16
6. Step 6: Final answer
   x = 586,981.73