Finding the Fourth Proportional to 1,685,443.68, 2,528,417.30 and 620,404.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685,443.68 : 2,528,417.30 = 620,404.79 : x
2. Step 2: Convert to fraction form
   1,685,443.68/2,528,417.30 = 620,404.79/x
3. Step 3: Cross multiply
   1,685,443.68x = 2,528,417.30 × 620,404.79
4. Step 4: Simplify right side
   1,685,443.68x = 1,568,642,188,294.76
5. Step 5: Solve for x
   x = 1,568,642,188,294.76/1,685,443.68
6. Step 6: Final answer
   x = 930,699.85