Finding the Fourth Proportional to 1,010.89, 1,397.61 and 763.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.89 : 1,397.61 = 763.48 : x
2. Step 2: Convert to fraction form
   1,010.89/1,397.61 = 763.48/x
3. Step 3: Cross multiply
   1,010.89x = 1,397.61 × 763.48
4. Step 4: Simplify right side
   1,010.89x = 1,067,047.28
5. Step 5: Solve for x
   x = 1,067,047.28/1,010.89
6. Step 6: Final answer
   x = 1,055.55