Finding the Fourth Proportional to 1,338.68, 1,847.40 and 763.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.68 : 1,847.40 = 763.81 : x
2. Step 2: Convert to fraction form
   1,338.68/1,847.40 = 763.81/x
3. Step 3: Cross multiply
   1,338.68x = 1,847.40 × 763.81
4. Step 4: Simplify right side
   1,338.68x = 1,411,062.59
5. Step 5: Solve for x
   x = 1,411,062.59/1,338.68
6. Step 6: Final answer
   x = 1,054.07