Finding the Fourth Proportional to 2,665,376.67, 3,998,061.77 and 868,257.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665,376.67 : 3,998,061.77 = 868,257.21 : x
2. Step 2: Convert to fraction form
   2,665,376.67/3,998,061.77 = 868,257.21/x
3. Step 3: Cross multiply
   2,665,376.67x = 3,998,061.77 × 868,257.21
4. Step 4: Simplify right side
   2,665,376.67x = 3,471,345,953,486.58
5. Step 5: Solve for x
   x = 3,471,345,953,486.58/2,665,376.67
6. Step 6: Final answer
   x = 1,302,384.76