Finding the Fourth Proportional to 881,786.25, 1,215,458.81 and 663,667.10

Step by Step Solution

1. Step 1: Write the proportion equation
   881,786.25 : 1,215,458.81 = 663,667.10 : x
2. Step 2: Convert to fraction form
   881,786.25/1,215,458.81 = 663,667.10/x
3. Step 3: Cross multiply
   881,786.25x = 1,215,458.81 × 663,667.10
4. Step 4: Simplify right side
   881,786.25x = 806,660,021,567.89
5. Step 5: Solve for x
   x = 806,660,021,567.89/881,786.25
6. Step 6: Final answer
   x = 914,802.22