Finding the Fourth Proportional to 1,360.69, 1,877.77 and 763.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.69 : 1,877.77 = 763.31 : x
2. Step 2: Convert to fraction form
   1,360.69/1,877.77 = 763.31/x
3. Step 3: Cross multiply
   1,360.69x = 1,877.77 × 763.31
4. Step 4: Simplify right side
   1,360.69x = 1,433,327.71
5. Step 5: Solve for x
   x = 1,433,327.71/1,360.69
6. Step 6: Final answer
   x = 1,053.38