Finding the Fourth Proportional to 888.22, 1,227.69 and 782.50

Step by Step Solution

1. Step 1: Write the proportion equation
   888.22 : 1,227.69 = 782.50 : x
2. Step 2: Convert to fraction form
   888.22/1,227.69 = 782.50/x
3. Step 3: Cross multiply
   888.22x = 1,227.69 × 782.50
4. Step 4: Simplify right side
   888.22x = 960,667.43
5. Step 5: Solve for x
   x = 960,667.43/888.22
6. Step 6: Final answer
   x = 1,081.56