Finding the Fourth Proportional to 1,185,797.91, 1,636,401.61 and 641,933.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,797.91 : 1,636,401.61 = 641,933.68 : x
2. Step 2: Convert to fraction form
   1,185,797.91/1,636,401.61 = 641,933.68/x
3. Step 3: Cross multiply
   1,185,797.91x = 1,636,401.61 × 641,933.68
4. Step 4: Simplify right side
   1,185,797.91x = 1,050,461,307,465.23
5. Step 5: Solve for x
   x = 1,050,461,307,465.23/1,185,797.91
6. Step 6: Final answer
   x = 885,868.75